Hand Dermatitis: Review of Clinical Features and Treatment Options Spring Golden, MD, and Tatyana Shaw, MD Hand dermatitis affects a significant portion of the population and can be caused by a variety of endogenous factors (ie, atopy) as well as occupational and environmental exposures. It is often a chronic problem with high costs to individuals, employers, and society. This review discusses subtypes of hand dermatitis based on their clinical features and pathogenesis. It also offers an approach to treatment. Semin Cutan Med Surg 32:147-157 © 2013 Frontline Medical Communications KEYWORDS hand dermatitis, chronic hand dermatitis, irritant contact dermatitis, allergic contact dermatitis, frictional hand dermatitis, hyperkeratotic dermatitis, psoriasiform hand dermatitis, nummular dermatitis, atopic dermatitis, vesicular dermatitis, dyshidrotic dermatitis, pompholyx H and dermatitis is one of the most common entities encountered in dermatology, affecting 2%-9% of the general population.1 The quality of life impact is significant, considering that hands play such an important role in social and occupational settings. Increased severity of hand dermatitis correlates to decreased quality of life for many patients.2 Furthermore, hand dermatitis is often a chronic debilitating problem, which lasts on average 10 to15 years from onset.3 Treatment and management of the disease can be frustrating and costly. Hand dermatitis is also the most common presentation of work-related skin diseases. Epidemiological studies have indicated that about 80% of occupational related dermatoses affect the hands.4 Considering that many of the individuals do not seek medical care, true prevalence numbers are difficult to obtain and might be even higher. One study found that of the 63% of kitchen workers affected by hand eczema, only 35% actually contacted a physician.5 Wet-work environments contribute to higher prevalence of hand dermatitis in certain occupations, including health care workers, hairdressers, food industry employees, homemakers, and bartenders.6,7 Occupational allergen exposure can lead to the development of allergic contact hand dermatitis, a subtype of hand dermatitis. Severe hand dermatitis has been a factor in workers needing sick leave or switching occupations. Department of Dermatology, Oregon Health & Science University, Portland. Disclosures: The authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and none were reported. Correspondence: Tatyana Shaw, MD, Department of Dermatology, Oregon Health & Science University, 3303 SW Bond Avenue, CH16D, Portland, OR 97239-4501. E-mail: shawta@ohsu.edu 1085-5629/13/$-see front matter © 2013 Frontline Medical Communications DOI: 10.12788/j.sder.0027 This article will review the many clinical variants of chronic hand dermatitis in hopes of helping clinicians accurately diagnose those conditions as well as provide a treatment algorithm for their management. Approach to Patient and Diagnostic Studies There are many clinical variants of hand dermatitis, subtypes of which are listed in Table 1. Furthermore, many individuals will have a hybrid of those clinical entities, making an accurate diagnosis challenging.8 Hand dermatitis is a clinical diagnosis, relying on physical examination and a patient’s history more so than laboratory testing. It presents with varying degrees of pruritic and occasionally tender erythematous. The papules and plaques are at times scaly and crusty, which make them appear to be ill defined and more sharply demarcated. Vesicles and bullae are sometimes intermixed with plaques, but can also be the only morphologic feature present. Acute dermatitis will have more erythema and a vesicular appearance versus chronic dermatitis, which is more likely to have hyperkeratotic, lichenified, and fissured plaques. Physical examination of the hands should include a careful look at the distribution of the dermatitis (palmar, dorsal, fingers, web spaces, fingernail, and periungual skin) as well as the extension of dermatitis to the wrists or forearms. Examination of the feet should be part of the clinical investigation as some of the variants of hand dermatitis can have both hand and foot involvement. A complete skin exam is necessary if there are other conditions such as psoriasis, mycosis fungoides, atopic dermatitis that are 147 S. Golden and T. Shaw 148 Table 1 Clinical Variants of Hand Dermatitis Type Atopic Dermatitis Allergic Contact Dermatitis Irritant Contact Dermatitis Hyperkeratotic/Psoriasiform/ Frictional Dermatitis Nummular Dermatitis Pompholyx/Dyshidrotic Eczema Chronic Vesicular Dermatitis Clinical Presentation Comments Plaques on the dorsal hands, fingers and volar wrists with or without nail changes Dorsal hand and fingertip involvement that may progress up forearms Symmetrical, often involves web spaces extending to dorsal hands. Plaques under the rings on the fingers Increased risk of ACD and ICD Well defined hyperkeratotic erythematous plaques on palms with fissuring Asymmetrical, coin-like lesions on dorsal hands Intermittent and recurrent bullae on palms or papulovesicles on sides of fingers. Bland vesicles and bulla, no erythema Chronic eruption of vesicles on an erythematous base Increased risk of ACD Most common type of hand dermatitis Check for tinea pedis and treat Abbreviations: ACD, allergic contact dermatitis; ICD, irritant contact dermatitis. considered in the differential diagnosis. As with many dermatologic conditions, the patient’s history gives important clues (Table 2), which can include a history of atopic dermatitis, asthma, rhinitis, psoriasis, prior patch-testing results, occupation, hobbies, hand-washing routine, skin care products, other contactants, symptoms, and chronicity of the disease. Taking a bacterial swab culture can help rule out a bacterial skin infection. Disrupted skin barrier seen in all subtypes of hand dermatitis predisposes to staphylococcal and streptococcal skin infections. Staphylococcus aureus is the most common culprit; however, cases of methicillin-resistant Staphylococcus aureus (MRSA) have been seen as well. Patients with a history of atopic dermatitis are at highest risk. Rarely, the herpes simplex virus can infect eczematous skin of the hands and cause eczema herpeticum. Getting a Tzank smear or a viral swab for a viral culture or polymerase chain reaction (PCR) is helpful if clinically one sees the scatter of sharply demarcated small crusty erosions or vesicles. Skin scrapings for a potassium hydroxide (KOH) preparation or a fungal culture is recommended when feet lesions are present. Tinea manus can mimic chronic hand dermatitis. Id Table 2 Important Aspects of the Patient’s History When Investigating Hand Dermatitis Patient History Date of onset and progression Associated symptoms such as burning, itching, or pain Occupation and relationship to work (do symptoms improve on vacation) Hobbies Skin care products Chemicals, glues, paints, or other materials touching hands Hand washing regimen Previous therapies History of atopic diathesis (childhood or adulthood eczema, hay fever, asthma) History of other skin diseases (ie, psoriasis) Family history of skin diseases and atopy reaction is possible if the patient has tinea pedis, but a negative KOH scraping from the hand plaques. At that point, treatment of coexisting tinea pedis becomes important in the management of hand dermatophytid. A skin biopsy is done when diagnosis is unclear and other dermatologic conditions are considered (Table 3). Histologically, all subtypes of hand dermatitis will show spongiosis with mixed inflammatory infiltrate. Vesicular types are more likely to show bigger spongiotic vesicles within epidermis. Hyperkeratotic/frictional types of hand dermatitis will show psoriasiform epidermal hyperplasia. Periodic acid-Schiff (PAS) staining can identify dermatophyte infection if biopsy shows psoriasiform spongiotic dermatitis with subcorneal neutrophils. Patch testing is done when allergic contact dermatitis is suspected. Atopic Hand Dermatitis Atopic dermatitis is one of the most common chronic inflammatory skin conditions affecting 8% to 11 % of the United States population.9-11 The pathophysiology of atopic dermatitis is characterized by mutations in the filaggrin gene and a loss of epidermal barrier function resulting in dry, scaly, inflamed, and pruritic skin. It is well known that children with a history of atopic dermatitis are more likely to develop hand dermatitis as adults.12 The prevalence of hand dermatitis in atopics is estimated to be around 60% for all ages.13 Although there are many clinical presentations of atopic hand dermatitis, the most common distribution is over dorsal hands and dorsal fingers (Figure 1). In a study by Simpson et al, dorsal hand and volar wrist involvement was seen in most cases of atopic hand dermatitis (Figure 2). The plaques are usually scaly, ill-defined, pink, thin, or lichenified (Figure 3). Papules or vesicles can be present as well. Chronic volar wrist involvement can result in permanent hypopigmentation or depigmentation of the area. Nail changes such as loss of the cuticle, thickening/inflammation of the nail folds, or irregular ridging can occur. In addition to pruritus, painful fissures Hand dermatitis 149 Table 3 Chronic Hand Dermatitis Mimickers Condition Psoriasis Dermatophyte infections Scabies Lichen planus Dermatomyositis Pitaryasis rubra pilaris Mycosis Fungoides Differentiating Factors Well demarcated, erythematous, scaly plaques in characteristic for psoriasis distribution (scalp, concha, extensor surfaces, gluteal cleft, umbilicus). Nails with pitting, oil spots, distal onycholysis. Palmoplantar pustulosis. One hand, two feet involvement. Burrows and erythematous papules in web spaces and volar wrists, lateral fingers. Sharply demarcated, violaceous, flat topped scaly, polygonal papules and plaques. Other typical for lichen planus locations, such as oral mucosa, wrists, ankles, nails. Erythematous to violaceous plaques over DIP, PIP, MCP joints. May have dilated capillaries in nail folds and ragged cuticles. Hyperkeratotic yellow diffuse keratoderma/plaques. Confluent erythematous scaly plaques with follicular accentuation over the body. Islands of spared normal skin. Confluent erythematous hyperkeratotic plaques over the palms and soles. Abbreviations: DIP, distal interphalangeal joint; MCP, metacarpal phalanges joint; PIP, proximal interphalangeal joint. Allergic contact dermatitis is a Type IV delayed hypersensitivity response that is elicited when an allergen comes into direct contact with the skin. Development of dermatitis is usually delayed by a few days from the time of allergen exposure. This is in contrast to a Type I immediate hypersensitivity reaction, which is seen in urticaria where contact with an allergen results in hives within minutes to hours of exposure. The clinical presentation of allergic contact hand dermatitis can include itching, stinging, burning, and pain. Patients may also develop vesicles, bullae, erythematous papules, weeping, and crusting. Fingertips, nail folds, and dorsal hands are most commonly involved. However, any part of the hand can be affected. Clinicians should be suspicious of an allergic contact dermatitis if there is a change in the patient’s chronic pattern of dermatitis and if there is spread from the patient’s palms to either the dorsal hands or forearms. Often, irritant contact dermatitis predates development of allergic contact dermatitis. Frequent water exposure helps sensitization to contact allergens. In occupations where wetwork is combined with exposure to such allergens, allergic contact dermatitis is more common. For instance, one study of hand dermatitis in hairdressers in Bangkok reported relevant positive patch-test reactions in 75% of those cases. Reactions to paraphenylenediamine, nickel, and fragrance mix were the most frequent causative allergens among those hairdressers.14 Similarly, in health care workers, frequent handwashing and preceding irritant contact hand dermatitis are Figure 1 Atopic hand dermatitis with dorsal hand and periungual disease distribution. Courtesy of Eric Simpson, MD. Figure 2 Atopic hand dermatitis with volar wrist involvement. Courtesy of Eric Simpson, MD. within hyperkeratotic lichenified plaques cause a lot of distress in those patients. Water exposure was the most frequently cited exacerbating factor for flares of atopic hand dermatitis.9 Individuals with atopic dermatitis are more likely to develop both allergic and irritant contact dermatitis given their innate impaired barrier function. Therefore, it is important to consider all 3 of these causes of hand eczema in a patient with a history of atopy. Contact Hand Dermatitis Allergic Contact Dermatitis S. Golden and T. Shaw 150 Table 4 Allergens that Frequently Cause Allergic Contact Hand Dermatitis* Allergens Rubber Allergens Thiuram Carba Mix Fragrances Fragrance Mix Balsam of Peru Figure 3 Atopic hand dermatitis in an infant with dorsal hand involvement and nummular plaques on the ankles. Courtesy of Eric Simpson, MD. risk factors for the development of allergic contact dermatitis to gloves (Figure 4). Any type of hand dermatitis or history of atopy can be a risk factor for acquiring allergen sensitization.15-18 The most common allergens causing allergic contact hand dermatitis (Table 4 and Figure 5) are nickel (hand tools, jewelry), rubber accelerators (gloves), neomycin (topical antibiotics), chromate (leather), and preservatives (skin care products).15,19,20 Diagnosis of an allergic contact dermatitis is aided by patch testing. Detailed exposure history from work, home, and hobby environments gives important clues and guides the selection of appropriate patch tests. Patch tests are applied to the patient’s back for 48 hours under occlusion. The patch tests are then read at 48 hours and at 5-7 days. A positive reaction is attained when there is a fixed area of erythema that is either blistered or elevated. Patients can also do a Repeat Open Application Test (ROAT) to their own products by applying them twice daily on the inner forearm for up to a Figure 4 Allergic contact hand dermatitis in a typical glove allergen distribution. Courtesy of Patricia Norris, MD. Preservatives Methylchloroisothiazolinone Methylisothiazolinone Quaternium-15 Formaldehyde and releasers Antibiotics Neomycin sulfate Bacitracin Metal Nickel Potassium dichromate Source Gloves Occupation: healthcare, hairdressers Skin care products, cosmetics, hair products Skin care products, cosmetics, lubricants, household products Topical antibiotics Costume jewelry, keys, coins, buttons, tools Tanned leather gloves *These allergens are a sampling of common allergens found to cause allergic contact hand dermatitis and by no means an exhaustive list of contact dermatitis allergens. week to see if a response is elicited. A diagnosis of allergic contact dermatitis is made when a patient has a positive patch-test reaction and a relevant exposure to the allergen in question. Irritant Contact Dermatitis Irritant contact dermatitis is one of the most common variants of hand dermatitis comprising approximately 80% of all contact hand dermatitis.15 Irritant contact hand dermatitis is caused by repetitive exposure to mechanical and chemical irritants such as water, soap, solvents, oils, friction, and trauma. Irritants can cause the release of inflammatory cytokines, decrease in surface lipids, and denature epidermal keratinocytes, all of which lead to decreased barrier function and a decrease in epidermal water content.15,16,21 The most common cause of irritant hand dermatitis is hand washing where the wet-to-dry cycle disrupts the epidermal barrier. Irritant contact dermatitis usually appears within 3 months of the first exposure to wet work. Those individuals with an already compromised epidermal barrier, such as those with atopic dermatitis, are more susceptible to irritant hand dermatitis.15,22 Furthermore, irritant contact hand dermatitis may lead to the development of an allergic contact dermatitis. The disruption of the epidermal barrier leads to enhanced susceptibility for allergen sensitization, as discussed in the previous section. Clinically, irritant contact dermatitis presents with xerosis, scaly erythematous plaques, fissuring, and lichenification. It commonly involves web spaces and can extend to the dorsal and ventral surface of the hand and fingers (Figure 6). Vesicles do not typically form. Pruritus can be mild; however, Hand dermatitis 151 Figure 6 Irritant contact hand dermatitis in a hospital worker. Web spaces are often involved when wet-work is an exacerbating factor. Courtesy of Susan Tofte, NP. Figure 5 Allergic contact dermatitis to surgical gloves. (A) Lichenified plaques over the radial portion of the dorsal hand near the thumb is a very typical distribution for allergic contact dermatitis to gloves. (B) Patch-testing results. Relevant positive patch tests to rubber accelerators (thiuram and carba mix) and 2 types of surgical gloves used by the patient at work. Both sets of gloves contained rubber products. stinging, burning and pain are frequently reported symptoms. Both irritant and allergic contact dermatitis have a predilection for certain occupations. They are found to be more common in hospital workers, construction laborers, food industry workers, janitorial workers, machinists/mechanics, and beauticians (Figure 7). Hyperkeratotic Hand Dermatitis Hyperkeratotic or psoriasiform hand dermatitis comprises approximately 2% of hand dermatitis.17 The cause of this dermatitis is unknown; however, patients will often have a Figure 7 (A, B) Irritant contact hand dermatitis in a barista. Only the patient’s right thumb was repetitively exposed to water as she made coffee drinks at work. Courtesy of Susan Tofte, NP. S. Golden and T. Shaw 152 Figure 9 Frictional hand dermatitis. Courtesy of Eric Simpson, MD. Figure 8 Psoriasis mimicking hyperkeratotic hand dermatitis. Courtesy of Patricia Norris, MD. history of manual labor. It is more common in men 40-60 years of age. This hand dermatitis is defined as symmetric hyperkeratosis of the palms that is well demarcated without involvement of the wrists. Cracking and fissuring of the palms often causes pain. This form of dermatitis also lacks vesicles. Itching can be minimal. In some cases, there may be foot involvement. Sometimes it is difficult to differentiate it from psoriasis (Figure 8). Absence of other clinical features of psoriasis or psoriatic arthritis is a helpful distinguishing factor. Histologically one will see hyperkeratosis, parakeratosis, acanthosis, and some spongiosis, which is otherwise known as psoriasiform dermatitis. The course of this hand dermatitis tends to be chronic and often resistant to treatment. Frictional Hand Dermatitis Frictional hand dermatitis is caused by the “wear and tear” of repetitive mechanical forces. These mechanical forces include friction, pressure, trauma, and vibration. This dermatitis may take years to develop depending on the extent and duration of those mechanical insults on the hands. Repetitive friction causes hyperkeratotic plaques and occasionally bullous lesions if the related force is of high enough intensity. This type of hand dermatitis is not pruritic or vesicular. Work-related frictional hand dermatitis has been reported by those who handle money, carbonate copy paper, bus tickets, artificial fur, panty hoses, carpeting material, and computer mice.23,24 There is overlap between frictional hand dermatitis and hyperkeratotic/psoriasiform dermatitis. In fact, they may be the same entity (Figure 9). Plaques are often asymmetric and can reoccur in different places on the hand. Patients may also have nummular plaques elsewhere on the body. Vesicular Hand Dermatitis and Dyshidrotic Hand Dermatitis/Pompholyx Pompholyx (acute dyshidrotic hand dermatitis) has intermittent and episodic recurrences of vesicles and bullae that typically last 2 to 3 weeks before resolving (Figure 11). Between episodes, patients have normal appearing skin. Sometimes pompholyx presents with large tender bulla without surrounding erythema on the palms. More frequently, collections of very itchy small papulovesicles on the sides of the fingers are seen (Figure 12). Secondary bacterial infections can occur. Dermatophyte infection and an id reaction to a dermatophyte elsewhere on the skin can present similarly. Therefore, it is important to check the patient’s feet and do potassium chloride scrapings to rule out a fungal infection. Some studies have suggested that a nickel allergy may be associated with pompholyx. In these studies, patients who were allergic to nickel ingested nickel orally and had reacti- Nummular Hand Dermatitis Nummular hand dermatitis does not have any specific age or gender demographics. It is characterized by papules, vesicles, and coined shaped eczematous plaques, which appear more frequently on the dorsal hands and distal fingers (Figure 10). Figure 10 Nummular hand dermatitis. Hand dermatitis Figure 11 Acute dyshidrotic hand dermatitis. Courtesy of Patricia Norris, MD. vation of their dermatitis. However, the quantities of nickel ingested in these studies were much higher than their typical dietary value. Other studies have not found a relationship with the ingestion of nickel causing worsening hand findings.17 Chronic vesicular hand dermatitis is a distinct clinical entity from pompholyx as it often lacks the episodic timing and presents with more erythematous appearing vesicles. We see the chronic appearance of pruritic vesicles on the palms and/or on the fingertips. In some patients feet are also involved. Treatment Basic Principles: Good Hand Care The treatment of all subtypes of hand dermatitis is similar. All treatment starts with attempts to restore skin barrier function and avoidance of exacerbating factors. A recent trial of hospital workers with hand eczema showed improvement in the patient’s dermatitis when education and counseling about proper skin care was provided.25 Skin care products in the form of thick creams, ointments, or petrolatum products are important in helping to restore the skin’s protective barrier.26 Frequent reapplication, especially after hand washing, is key. Avoidance of common irritants and skin care products with an alcohol or water base helps to avoid further water evaporation and drying of the hands. Creams should also be fragrance-free and contain as few preservatives as possible to avoid allergens that may result in an allergic contact dermatitis. It is also very important to cut down on wet work, especially in occupations involving repetitive wet-to-dry cycles. Some of the hand sanitizers on the market are less irritating than the typical hand washing routine. Protective clothing and changing work flow/environment can help to avoid contact with allergens and irritants. Thin cotton gloves under occlusive gloves are recommended. However, some allergens can pass through the gloves. For instance, acrylate monomers, which are used in dentistry, penetrate rubber (latex and neoprene) and vinyl gloves. 153 studies are lacking, open-label studies have shown a benefit with topical steroids. In an open-label study done by Veien et al, mometasone fumarate was used freely by participants for up to 9 weeks and 75% of the patients were found to be clear by 6 weeks. In a follow-up study, individuals were randomized to use either mometasone 2 days per week, 3 days per week, or use emollients alone freely. Individuals in both steroid treatment arms showed a longer recurrence-free rate, 83% in the 3 times per week group, and 67% in the twice weekly group using steroids. Only 26% of the individuals using only an emollient benefited.27 The American Academy of Dermatology recommends that potent topical steroids be used on the hands twice daily for up to a month and then tapered down to 2 to 3 times per week for maintenance.28 Occlusion of the topical steroid with cotton gloves aides in intensifying the therapeutic effect. Ointment vehicles of topical therapy are preferred over cream-based formulations as they contain less water and preservatives. If long-term topical treatment is needed, then calcineurin inhibitors such as tacrolimus or pimecrolimus can be used daily for maintenance therapy. Unlike topical steroids, these therapies do not cause skin atrophy or telangietasias. Pimecrolimus was studied in 2 large randomized controlled clinical trials and found to be more efficacious in treating hand dermatitis when used twice daily with overnight occlusion compared to using just a vehicle cream alone.29 Similarly, smaller studies have shown twice daily application of tacrolimus to be more beneficial than vehicle cream alone in both clinical improvement and patient subjective views of improvement.30,31 Light and Radiation Therapy Phototherapy is a second-line treatment for chronic hand dermatitis. Both psoralen in conjunction with ultraviolet A (PUVA) and ultraviolet B (UVB) light therapy have been studied. In a study done by Rosen et al, treatment with PUVA was compared to UVB in 2 separate study groups and within the same patient by applying each therapy to different hands. Topical Therapy A potent topical steroid is the initial prescribed treatment of choice for hand dermatitis. Although randomized clinical Figure 12 Small vesicles on the lateral aspects of fingers is typically seen in dyshidrotic hand dermatitis. Courtesy of Eric Simpson, MD. 154 Both forms of phototherapy were effective in improving the hand dermatitis; however PUVA treatment was found to be more effective.32 Other studies have shown equal efficacy.33 If there is inadequate response when considering irritant effects with PUVA-soak therapy or side effects of oral psoralen intake, our recommendation is to start with narrow band UVB and progress to PUVA. Grenz ray is a type of superficial ionizing radiation that has been used to treat hand dermatitis. A double-blind study by Fairris et al showed that using superficial x-ray radiotherapy in conjunction with topical steroids was more effective in treating hand dermatitis compared to topical therapy alone.34 Grenz ray has also been reported to be beneficial in recalcitrant frictional hand dermatitis.35 Treatment using Grenz ray typically involves 6 treatments of 200 to 400 rads spaced every 1 to 3 weeks. This is followed by a 6-month break in treatment. Grenz ray is a safe therapeutic option as the rays are almost entirely absorbed in the upper 3 mm of the dermis.36 However, it is recommended that individuals not exceed more than 5,000 rads in a lifetime. Systemic Therapy For acute or recurrent vesicular hand dermatitis, systemic glucocorticoids can be helpful if started at the onset of symptoms and only used for up to 3 to 5 days.17 For some patients, it is the only way they are able to halt a pompholyx flare quickly. Allergic contact dermatitis and atopic hand dermatitis may also benefit from systemic steroids if the dermatitis is severe. However, systemic glucocorticoids should not be used for long-term treatment of any form of hand dermatitis due to the many long-term side effects. Among the effects are cataracts, glaucoma, hyperglycemia, osteoporosis, and suppression of the hypothalamic-pituitary-adrenal access. Oral retinoids have been studied and proven to be efficacious in controlling hand dermatitis, especially the hyperkeratotic/psoriasiform or frictional variants. Both alitretinoin and acitretin improved chronic hand eczema. However, alitretinoin is only approved for hand eczema in Europe and Canada. In one study, 40% of patients taking 30 mg of alitretinoin daily were clear and 24% of patients taking 10 mg were clear.37,38 Retinoids are a great third-line treatment for chronic hand dermatitis given their good safety profile and less frequent lab monitoring compared to immunomodulating medications. The main side effects of retinoids include xerosis, increase in lipid levels, and teratogenicity. Therefore individuals of child-bearing age need to be carefully monitored with pregnancy tests and counseled about the side effects. Acitretin is not recommended for women of child-bearing age as currently there is a recommendation to avoid pregnancy for 3 years after discontinuation of acitretin therapy. Oral immunomodulating medications have also been tried in the treatment of hand dermatitis. They are considered when topical therapy or phototherapy fails. Support for the use of immunomodulating drugs comes primarily from studies in atopic dermatitis.39 Cyclosporine is one medication known to suppress T-lymphocytes. In particular, atopic der- S. Golden and T. Shaw matitis patients may show great benefit from starting this medication. One double-blinded randomized trial of 41 patients showed that 50% of individuals given oral cyclosporine at a dose of 3 mg/kg/day improved compared to 32% of individuals given topical corticosteroids after 6 weeks.40 Another trial of 41 patients after 1 year on oral cyclosporine (3 mg/kg/day) showed between a 50%-79% improvement depending on the type of hand dermatitis.41 In severe cases, cyclosporine doses of 5 mg/kg/day for 3 months can be helpful in halting a significant flare while allowing the patient to bridge to a different long-term therapy. However, cyclosporine is not a good long-term medication due to its side effects of nephrotoxicity, hepatotoxicity, and hypertension. Cyclosporine can be used to induce clearance or improvement of a patient’s hand dermatitis as the patient transitions to a more long-term therapy. Mycophenolate mofetil, azatihoprine, and methotrexate are immunomodulating medications that have been used for chronic hand dermatitis. Mycophenolate mofetil inhibits the synthesis of guanosine nucleotides needed for lymphocyte proliferation. There are a few case reports of individuals with dyshidrotic eczema having clearing with mycophenolate mofetil therapy. One patient with a 4-year history of recalcitrant disease that was previously treated with corticosteroids, iontophoresis, and phototherapy was placed on 3 g/day of mycophenolate mofetil and had complete clearance of his disease within 4 weeks. The dose was then reduced gradually over a 1-year period without recurrence of dermatitis. Typical doses of mycophenolate mofetil are between 2 to 3 grams per day.42,43 Methotrexate is another medication that can be used for hand dermatitis and works by inhibiting dihydrofolate reductase, which is an enzyme important in cell proliferation. In one study, low-dose methotrexate (12.5 to 22.5 mg per week) was given to 5 patients with recalcitrant pompholyx and all patients showed partial or complete remission of their disease while on methotrexate.44 Azathioprine, which works by inhibiting ribonucleic and deoxyribonucleic acid synthesis, has been reported to help atopic dermatitis, allergic contact dermatitis, and pompholyx. Participants in these studies were given daily doses between 100 mg and 150 mg daily. The effects were seen typically between the 4th and 6th week of treatment.45 With all of these immunomodulating medications, frequent lab draws are necessary to evaluate for hepatotoxicity, nephrotoxicity, and bone marrow suppression. Literature on the use of antitumor necrosis factor-␣ treatments is lacking. Given their anti-inflammatory potential and beneficial use in conditions such as psoriasis, Bechet’s disease, and pyoderma gangrenosum, the existing literature may have some efficacy in treating hand dermatitis. There is one case study of a patient with a 6-year history of recalcitrant pompholyx who was treated with etanercept. She was placed on twice weekly 25 mg etanercept subcutaneous injections and, after 4 months, had reached remission. However, she suffered a flare and her dose was doubled to 50 mg twice weekly. Unfortunately, this increase in dosage did not benefit her and treatment with etanercept was discontinued.46 More studies are Hand dermatitis 155 Table 5 Treatment Options Medication Topical steroids Dosing Lab Monitoring Twice daily for 1 month then decrease to 2-3 times per week Twice daily None Two to three times weekly slowly increasing treatment each visit Six treatments of 200-400 rad every 1-3 weeks, max lifetime dose 500010,000 rads 20-60 mg per day for 3-4 days None Oral retinoids (Acitretin and Alitretinoin) Acitretin – 10-50 mg per day Alitretinoin – 10-30 mg per day Cyclosporine 3 mg/kg/day Pregnancy test, CBC, LFTs, renal function, fasting lipid panel monthly for 3-6 months then every 3 months Blood pressure, CBC, renal function, LFTs, Mg, K, Uric acid, fasting lipids at baseline, every 2 weeks for 1-2 months and then monthly Mycophenolate mofetil 2 to 3 grams per day Methotrexate 12.5 to 22.5 mg per week with daily folic acid supplementation Azathioprine 50-150 mg per day Topical calcineurin inhibitors PUVA or narrow band UVB Grenz ray Oral prednisone None Side Effects Atrophy, telangiectasias, acne/rosacea, striae Skin malignancies, lymphoma Skin malignancies, headaches, nausea None Skin malignancies Consider checking glucose levels especially in diabetic patients, long-term use will need bone density evaluations Cataracts, glaucoma, hyperglycemia, osteoporosis, and suppression of the hypothalamicpituitary-adrenal access Xerosis, increase in lipid levels, hepatotoxicity, and teratogenicity Pregnancy test, CBC, CMP, Hepatitis B and Hepatitis C, PPD at baseline, then CBC and CMP every 2-4 weeks during dose escalation and then every 3 months when dose stable* CBC, CMP, urinalysis at baseline, 1-2 weeks after initiation, then monthly for 1-2 months then every 3 months Thiopurine methyltransferase at baseline, CBC, CMP, pregnancy test, urinalysis, and PPD at baseline, every 2 weeks for 2 months then every 3 months Hyperlipidemia, hypertension, hepatotoxicity, nephrotoxicity, hyperkalemia, hyperuricemia, hypomagnesemia GI symptoms, opportunistic infections, bone marrow suppression Hepatotoxicity, bone marrow suppression, pulmonary fibrosis/ pneumonitis, carcinogenesis, oral ulcers, GI upset GI upset, bone marrow suppression, hepatotoxicity, increased risk of infections, carcinogenicity *Mycophenolate mofetil prescription now requires registration with the Mycophenolate REMS. Physicians are required to educate patients about the teratogenicity of the medication. Reproductive age females must have a pregnancy test before initiating the drug, 8-10 days after the initial pregnancy test and monthly while on the drug. Patients must also use contraception while taking mycophenolate and for 6 weeks after discontinuation of the drug. All pregnancies during treatment must be reported to the Mycophenolate Pregnancy Registry. Abbreviations: CBC, complete blood count; CMP, comprehensive metabolic panel; GI, gastrointestinal; K, potassium; LFT, liver function tests; Mg, magnesium; PPD, purified protein derivative tuberculin test; PUVA, psoralen ultraviolet A; UVB, ultraviolet B. S. Golden and T. Shaw 156 therefore needed to assess whether treatment with antitumor necrosis factor-␣ medications would be helpful. Finally, patients with hand dermatitis should also be assessed for bacterial infections and, if present, should be treated with either systemic or topical antibiotics. Treatment options, dosing, monitoring and side effects are listed in Table 5.47 Conclusion Chronic hand dermatitis is commonly encountered in the practice of dermatology. Numerous types of chronic hand dermatitis exist, including atopic dermatitis, allergic contact dermatitis, irritant contact dermatitis, hyperkeratotic/psoriasiform dermatitis, frictional dermatitis, chronic vesicular dermatitis, and dyshidrotic dermatitis/pompholyx. Hand dermatitis is often a combination of these entities and therefore may prove to be a diagnostic challenge. This paper highlights the clinical distinctions between the various forms of hand dermatitis to help clinicians establish accurate diagnoses and differentiate hand dermatitis from other primary dermatology conditions. Treatment of hand dermatitis starts with helping to repair the skin barrier with proper hand-care hygiene. Avoiding wet and dry cycles as well as moisturizing is of utmost importance. First-line prescription therapy involves using potent topical steroids and often a topical calcineurin inhibitor as maintenance therapy. Light therapy, either PUVA or narrow band UVB, and Grenz ray therapy are considerations for hand dermatitis that failed topical treatment. Finally, oral retinoids or immunomodulating medications can be used as they are helpful in many inflammatory skin disorders. Physicians must work together with patients to find a treatment option that best suits the patient as studies have shown that chronic hand dermatitis can negatively impact one’s quality of life. References 1. Meding B, Jarvholm B. Hand eczema in Swedish adults - changes in prevalence between 1983 and 1996. J Invest Dermatol. 2002;118(4): 719-723. 2. 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