Background
Dermatitis herpetiformis (DH) is an autoimmune blistering disorder associated with a gluten-sensitive enteropathy (GSE). The disease was described and named in 1884 by Dr. Louis Duhring at the University of Pennsylvania.[1] Dermatitis herpetiformis is characterized by grouped excoriations; erythematous, urticarial plaques; and papules with vesicles. The classic location for dermatitis herpetiformis lesions is on the extensor surfaces of the elbows, knees, buttocks, and back. Dermatitis herpetiformis is exquisitely pruritic, and the vesicles are often excoriated to erosions by the time of physical examination, as shown in the image below.
Classic vesicles of dermatitis herpetiformis. Diagnosis requires direct immunofluorescence of a skin biopsy specimen showing deposition of immunoglobulin A (IgA) in a granular pattern in the upper papillary dermis. Although most patients are asymptomatic, greater than 90% have an associated gluten-sensitive enteropathy upon endoscopic examination. Among patients with celiac disease, 15-25% develop dermatitis herpetiformis. The mainstays of treatment are dapsone and a gluten-free diet.
Pathophysiology
Dermatitis herpetiformis is a disease of the skin caused by the deposition of IgA in the papillary dermis, which triggers an immunologic cascade, resulting in neutrophil recruitment and complement activation. Dermatitis herpetiformis is the result of an immunologic response to chronic stimulation of the gut mucosa by dietary gluten.
An underlying genetic predisposition to the development of dermatitis herpetiformis has been demonstrated. Both dermatitis herpetiformis and celiac disease (CD) are associated with an increased expression of HLA-A1, HLA-B8, HLA-DR3, and HLA-DQ2 haplotypes. Environmental factors are also important; monozygotic twins may have dermatitis herpetiformis, celiac disease, and/or gluten-sensitive enteropathy with variable symptomatology.
The leading theory for dermatitis herpetiformis is that a genetic predisposition for gluten sensitivity, coupled with a diet high in gluten, leads to the formation of IgA antibodies to gluten-tissue transglutaminase (t-TG), which is found in the gut. These antibodies cross-react with epidermal transglutaminase (e-TG).[2] eTG is highly homologous with tTG. Serum from patients with gluten-sensitive enteropathy, with or without skin disease, contains IgA antibodies to both skin and gut types.[3] Deposition of IgA and epidermal TG complexes in the papillary dermis cause the lesions of dermatitis herpetiformis.
In patients with gluten-sensitive enteropathy, levels of circulating antibodies to tissue and epidermal transglutaminase have been found to correlate with each other, and both appear to correlate with the extent of enteropathy.[4]
Co-localized IgA and eTG deposits have been demonstrated in the papillary dermis in patients with dermatitis herpetiformis and, to lesser extent, in healthy skin of gluten-sensitive enteropathy patients.[5] eTG has not been demonstrated in normal papillary dermis, suggesting it is part of the circulating complex that is deposited in the papillary dermis, rather than originating from the papillary dermis.
Cutaneous IgA deposits in dermatitis herpetiformis have been shown to function in vitro as a ligand for neutrophil migration and attachment. Although IgA deposition is pivotal for disease, an increased serum IgA is not necessary for pathogenesis; in fact, case reports describe dermatitis herpetiformis in patients with a partial IgA deficiency.[6] When the disease is active, circulating neutrophils have a higher level of CD11b and an increased ability to bind IgA. The characteristic histologic finding of dermatitis herpetiformis is neutrophil accumulation at the dermoepidermal junction, frequently localizing to the papillary tips of the basement membrane zone.
Collagenase and stromelysin 1 may be induced in basal keratinocytes either by cytokines released from neutrophils or by contact with keratin from damaged basement membrane matrix. Stromelysin 1 may contribute to blister formation.
One study found levels of E-selectin mRNA expression in normal-appearing skin of patients with dermatitis herpetiformis to be 1271 times greater that that of controls.[7] Additionally, the same study observed increased soluble E-selectin, IgA antitissue transglutaminase antibodies, tumor necrosis factor-alpha, and serum interleukin 8 (IL-8) levels in patients with dermatitis herpetiformis, providing further evidence of endothelial cell activation and a systemic inflammatory response as part of the pathogenic mechanism of the disease. Mild local trauma may also induce the release of cytokines and attract the partially primed or activated neutrophils, which is consistent with the typical location of dermatitis herpetiformis lesions on frequently traumatized areas, such as the knees and elbows.
Deposits of C3 also may be present in a similar pattern at the dermoepidermal junction. The membrane attack complex, C5-C9, also has been identified in perilesional skin, although it may be inactive and not contribute to cell lysis.[8]
A recent study showed an increased expression of disintegrin and metalloproteinase (ADAMs) 8, 10, 15, and 17 in lesional skin of patients with dermatitis herpetiformis compared with controls. The high affinity of ADAMs for the basement membrane led the authors to hypothesize a role in blister formation in dermatitis herpetiformis.[9]
Hormonal factors may also play a role in the pathogenesis of dermatitis herpetiformis, and reports describe dermatitis herpetiformis induced by treatment with leuprolide acetate, a gonadotropin-releasing hormone analog.[10] Androgens have a suppressive effect on immune activity, including decreased autoimmunity, and androgen deficient states may be a potential trigger for dermatitis herpetiformis exacerbation. Exacerbation of dermatitis herpetiformis by oral contraceptives has also been reported.
Apoptosis may contribute to the pathogenesis of epidermal changes in dermatitis herpetiformis, and research demonstrates a markedly increased apoptotic rate within the epidermal compartment in dermatitis herpetiformis.[11] In addition, Bax and Bcl-2 proteins are increased in the dermal perivascular compartment and Fas proteins showed epidermal staining in dermatitis herpetiformis lesions.
Most patients with dermatitis herpetiformis have histologic evidence of enteropathy, even in the absence of symptoms of malabsorption. In one study, all dermatitis herpetiformis patients had increased intestinal permeability (as measured by the lactulose/mannitol ratio) and up-regulation of zonulin, a regulator of tight junctions.[12] Thus, increased expression of zonulin may be involved in the pathogenesis of enteropathy in patients with dermatitis herpetiformis.
Epidemiology
Frequency
United States
The only US study showed a dermatitis herpetiformis prevalence of 11.2 cases per 100,000 population.
International
Prevalence of dermatitis herpetiformis has been reported as high as 10 cases per 100,000 population.
Mortality/Morbidity
In an English study, patients with dermatitis herpetiformis (152 total) were followed from the date of diagnosis to the end of 1989 for mortality and from 1971 or the date of diagnosis (if later) to 1986 for cancer incidence.[13] Death occurred in 38 patients younger than 85 years, slightly fewer than expected on the basis of national general population rates. Cancer incidence was significantly increased. Cancer of the small intestine caused 1 death, and lymphoma caused 1 death. Another English study, which compared 846 dermatitis herpetiformis patients with 4225 controls, found that dermatitis herpetiformis conferred no increased risk of lymphoproliferative cancer and no increase in fracture, malignancy, or mortality.[14]
A 30-year population-based study of 1147 celiac disease and dermatitis herpetiformis patients in Finland also revealed an overall good prognosis for patients with dermatitis herpetiformis.[15] The total occurrence of malignancies was equal to that of the general population in both celiac disease and dermatitis herpetiformis patients, but an increased incidence of non-Hodgkin lymphoma was noted among both celiac disease and dermatitis herpetiformis patients, with standardized incidence ratios of 3.2 and 6.0, respectively. Overall mortality was actually decreased in dermatitis herpetiformis patients compared with that in the general population.
Dermatitis herpetiformis lesions are extremely pruritic. Morbidity results from scarring, discomfort, and insomnia due to itching. Secondary infection may also develop, requiring antibiotic therapy.
Race
Dermatitis herpetiformis occurs more frequently in individuals of Northern European ancestry and is rare in Asians and persons of African descent. Dermatitis herpetiformis is most common in Ireland and Sweden. This can be attributed to the shared HLA associations of dermatitis herpetiformis and celiac disease including DQA1*0501 and B1*-02, which encode HLA-DQ2 heterodimers.
Sex
US studies show a male-to-female ratio of 1.44:1, but international studies have demonstrated a male-to-female ratio up to 2:1. In one study of patients with gluten-sensitive enteropathy, 16% of the men and 9% of the women had dermatitis herpetiformis.[16]
Age
Typically, the onset of dermatitis herpetiformis is in the second to fourth decade; however, persons of any age may be affected.[17] Dermatitis herpetiformis is rare in children.
Duhring L. Dermatitis herpetiformis. JAMA. 1884;3:225.
Sardy M, Karpati S, Merkl B, Paulsson M, Smyth N. Epidermal transglutaminase (TGase 3) is the autoantigen of dermatitis herpetiformis. J Exp Med. Mar 18 2002;195(6):747-57. [Medline].
Hull CM, Liddle M, Hansen N, et al. Elevation of IgA anti-epidermal transglutaminase antibodies in dermatitis herpetiformis. Br J Dermatol. Jul 2008;159(1):120-4. [Medline].
Marietta EV, Camilleri MJ, Castro LA, Krause PK, Pittelkow MR, Murray JA. Transglutaminase autoantibodies in dermatitis herpetiformis and celiac sprue. J Invest Dermatol. Feb 2008;128(2):332-5. [Medline].
Cannistraci C, Lesnoni La Parola I, et al. Co-localization of IgA and TG3 on healthy skin of coeliac patients. J Eur Acad Dermatol Venereol. Apr 2007;21(4):509-14. [Medline].
Samolitis NJ, Hull CM, Leiferman KM, Zone JJ. Dermatitis herpetiformis and partial IgA deficiency. J Am Acad Dermatol. May 2006;54(5 Suppl):S206-9. [Medline].
Hall RP 3rd, Takeuchi F, Benbenisty KM, Streilein RD. Cutaneous endothelial cell activation in normal skin of patients with dermatitis herpetiformis associated with increased serum levels of IL-8, sE-Selectin, and TNF-alpha. J Invest Dermatol. Jun 2006;126(6):1331-7. [Medline].
Dahl MV, Falk RJ, Carpenter R, Michael AF. Membrane attack complex of complement in dermatitis herpetiformis. Arch Dermatol. Jan 1985;121(1):70-2. [Medline].
Zebrowska A, Wagrowska-Danilewicz M, et al. Expression of selected ADAMs in bullous pemphigoid and dermatitis herpetiformis. Journal of Dermatological Science. 2009;56:58-73.
Grimwood RE, Guevara A. Leuprolide acetate-induced dermatitis herpetiformis. Cutis. Jan 2005;75(1):49-52. [Medline].
Caproni M, Torchia D, Antiga E, et al. The role of apoptosis in the pathogenesis of dermatitis herpetiformis. Int J Immunopathol Pharmacol. Oct-Dec 2005;18(4):691-9. [Medline].
Smecuol E, Sugai E, Niveloni S, et al. Permeability, zonulin production, and enteropathy in dermatitis herpetiformis. Clin Gastroenterol Hepatol. Apr 2005;3(4):335-41. [Medline].
Swerdlow AJ, Whittaker S, Carpenter LM, English JS. Mortality and cancer incidence in patients with dermatitis herpetiformis: a cohort study. Br J Dermatol. Aug 1993;129(2):140-4. [Medline].
Lewis NR, Logan RF, Hubbard RB, West J. No increase in risk of fracture, malignancy or mortality in dermatitis herpetiformis: a cohort study. Aliment Pharmacol Ther. Jun 1 2008;27(11):1140-7. [Medline].
Viljamaa M, Kaukinen K, Pukkala E, Hervonen K, Reunala T, Collin P. Malignancies and mortality in patients with coeliac disease and dermatitis herpetiformis: 30-year population-based study. Dig Liver Dis. Jun 2006;38(6):374-80. [Medline].
Bardella MT, Fredella C, Saladino V, et al. Gluten intolerance: gender- and age-related differences in symptoms. Scand J Gastroenterol. Jan 2005;40(1):15-9. [Medline].
Templet JT, Welsh JP, Cusack CA. Childhood dermatitis herpetiformis: a case report and review of the literature. Cutis. Dec 2007;80(6):473-6. [Medline].
Lahteenoja H, Irjala K, Viander M, Vainio E, Toivanen A, Syrjanen S. Oral mucosa is frequently affected in patients with dermatitis herpetiformis. Arch Dermatol. Jun 1998;134(6):756-8. [Medline].
Hardman CM, Garioch JJ, Leonard JN, et al. Absence of toxicity of oats in patients with dermatitis herpetiformis. N Engl J Med. Dec 25 1997;337(26):1884-7. [Medline].
Garsed K, Scott BB. Can oats be taken in a gluten-free diet? A systematic review. Scand J Gastroenterol. Feb 2007;42(2):171-8. [Medline].
Al-Niaimi F,Cox NH,Lewis-Jones S. Dermatitis herpetiformis exacerbated by cornstarch. JAAD. 2010;62:510-511.
Accetta P, Kumar V, Beutner EH, Chorzelski TP, Helm F. Anti-endomysial antibodies. A serologic marker of dermatitis herpetiformis. Arch Dermatol. Apr 1986;122(4):459-62. [Medline].
Gaspari AA, Huang CM, Davey RJ, Bondy C, Lawley TJ, Katz SI. Prevalence of thyroid abnormalities in patients with dermatitis herpetiformis and in control subjects with HLA-B8/-DR3. Am J Med. Feb 1990;88(2):145-50. [Medline].
Helsing P, Froen H. Dermatitis herpetiformis presenting as ataxia in a child. Acta Derm Venereol. 2007;87(2):163-5. [Medline].
Sigurgeirsson B, Agnarsson BA, Lindelöf B. Risk of lymphoma in patients with dermatitis herpetiformis. BMJ. Jan 1 1994;308(6920):13-5. [Medline]. [Full Text].
Hassan S, Dalle S, Descloux E, Balme B, Thomas L. [Dermatitis herpetiformis associated with progesterone contraception]. Ann Dermatol Venereol. Apr 2007;134(4 Pt 1):385-6. [Medline].
George DE, Browning JC, Hsu S. Medical pearl: dermatitis herpetiformis--potential for confusion with eczema. J Am Acad Dermatol. Feb 2006;54(2):327-8. [Medline].
Alonso-Llamazares J, Gibson LE, Rogers RS 3rd. Clinical, pathologic, and immunopathologic features of dermatitis herpetiformis: review of the Mayo Clinic experience. Int J Dermatol. Sep 2007;46(9):910-9. [Medline].
Desai AM, Krishnan RS, Hsu S. Medical pearl: Using tissue transglutaminase antibodies to diagnose dermatitis herpetiformis. J Am Acad Dermatol. Nov 2005;53(5):867-8. [Medline].
Sardy M, Csikos M, Geisen C, et al. Tissue transglutaminase ELISA positivity in autoimmune disease independent of gluten-sensitive disease. Clin Chim Acta. Feb 2007;376(1-2):126-35. [Medline].
Smith JB, Taylor TB, Zone JJ. The site of blister formation in dermatitis herpetiformis is within the lamina lucida. J Am Acad Dermatol. Aug 1992;27(2 Pt 1):209-13. [Medline].
Madan V, Jamieson LA, Bhogal BS, Wong CS. Inflammatory epidermolysis bullosa acquisita mimicking toxic epidermal necrolysis and dermatitis herpetiformis. Clin Exp Dermatol. Jul 29 2009;[Medline].
Van L, Browning JC, Krishnan RS, Kenner-Bell BM, Hsu S. Dermatitis herpetiformis: potential for confusion with linear IgA bullous dermatosis on direct immunofluorescence. Dermatol Online J. Jan 15 2008;14(1):21. [Medline]. [Full Text].
Ko CJ, Colegio OR, Moss JE, McNiff JM. Fibrillar IgA deposition in dermatitis herpetiformis-an underreported pattern with potential clinical significance. Journal of cutaneous pathology. 2010;37:475-477.
Koskinen O, Villanen M, Korponay-Szabo I, et al. Oats do not induce systemic or mucosal autoantibosy response in children with coeliac disease. Pediartic Gastroentol Nutr. 2009;48:559-65.
Reunala T, Collin P, Holm K, et al. Tolerance to oats in Dermatitis Herpetiformis. Gut. 1998;43:490-493.
Thompson, T, Lee AR, Grace T. Gluten Contamination of Grains, Seeds and Flours in the United States: A pilot study. American Diabetic Association. 2010;110:967-940.
Thompson T, Dennis M, Higgins LA, Lee AR, Sharrett MK. Gluten free diet survey: are Americans with coeliac disease consuming recommended amounts of fiber, iron, calcium and grain foods. J Hum Nutr Diet. 2005;18:163-9.
Paek SY, Steinberg SM, Katz SI. Remission in dermatitis herpetiformis: a cohort study. Arch Dermatol. Mar 2011;147(3):301-5. [Medline].
Sladden MJ, Johnston GA. Complete resolution of dermatitis herpetiformis with the Atkins' diet. Br J Dermatol. Mar 2006;154(3):565-6. [Medline].
Smith JB, Fowler JB, Zone JJ. The effect of ibuprofen on serum dapsone levels and disease activity in dermatitis herpetiformis. Arch Dermatol. Feb 1994;130(2):257-9. [Medline].
[Guideline] American Gastroenterological Association. AGA Institute medical position statement on the diagnosis and management of celiac disease. National Guideline Clearinghouse. Dec 2006;[Full Text].
Kadunce DP, McMurry MP, Avots-Avotins A, Chandler JP, Meyer LJ, Zone JJ. The effect of an elemental diet with and without gluten on disease activity in dermatitis herpetiformis. J Invest Dermatol. Aug 1991;97(2):175-82. [Medline].
Zeedijk N, van der Meer JB, Poen H, van der Putte SC. Dermatitis herpetiformis: consequences of elemental diet. Acta Derm Venereol. 1986;66(4):316-20. [Medline].
Abenavoli L, Proietti I, Leggio L, et al. Cutaneous manifestations in celiac disease. World J Gastroenterol. Feb 14 2006;12(6):843-52. [Medline].
Airola K, Vaalamo M, Reunala T, Saarialho-Kere UK. Enhanced expression of interstitial collagenase, stromelysin-1, and urokinase plasminogen activator in lesions of dermatitis herpetiformis. J Invest Dermatol. Aug 1995;105(2):184-9. [Medline].
Alaedini A, Green PH. Narrative review: celiac disease: understanding a complex autoimmune disorder. Ann Intern Med. Feb 15 2005;142(4):289-98. [Medline].
Alonso-Llamazares J, Gibson LE, Rogers RS 3rd. Clinical, pathologic, and immunopathologic features of dermatitis herpetiformis: review of the Mayo Clinic experience. Int J Dermatol. Sep 2007;46(9):910-9. [Medline].
Booth SA, Moody CE, Dahl MV, Herron MJ, Nelson RD. Dapsone suppresses integrin-mediated neutrophil adherence function. J Invest Dermatol. Feb 1992;98(2):135-40. [Medline].
Coleman MD. Dapsone: modes of action, toxicity and possible strategies for increasing patient tolerance. Br J Dermatol. Nov 1993;129(5):507-13. [Medline].
Cormane RH. Immunofluorescent studies of the skin in lupus erythematosus and other diseases. Pathologic Eur. 1967;2:170.
Dahlback K, Lofberg H, Dahlback B. Vitronectin colocalizes with Ig deposits and C9 neoantigen in discoid lupus erythematosus and dermatitis herpetiformis, but not in bullous pemphigoid. Br J Dermatol. Jun 1989;120(6):725-33. [Medline].
Degowin RL, Eppes RB, Powell RD, Carson PE. The haemolytic effects of diaphenylsulfone (DDS) in normal subjects and in those with glucose-6-phosphate-dehydrogenase deficiency. Bull World Health Organ. 1966;35(2):165-79. [Medline].
Frey HM, Gershon AA, Borkowsky W, Bullock WE. Fatal reaction to dapsone during treatment of leprosy. Ann Intern Med. Jun 1981;94(6):777-9. [Medline].
Fry L. Dermatitis herpetiformis: problems, progress and prospects. Eur J Dermatol. Nov-Dec 2002;12(6):523-31. [Medline].
Fry L, McMinn RM, Cowan JD, Hoffbrand AV. Effect of gluten-free diet on dermatological, intestinal, and haematological manifestations of dermatitis herpetiformis. Lancet. Mar 16 1968;1(7542):557-61. [Medline].
Fry L, McMinn RM, Cowan JD, Hoffbrand AV. Gluten-free diet and reintroduction of gluten in dermatitis herpetiformis. Arch Dermatol. Aug 1969;100(2):129-35. [Medline].
Hall RP 3rd. Dermatitis herpetiformis. J Invest Dermatol. Dec 1992;99(6):873-81. [Medline].
Hall RP, Lawley TJ. Characterization of circulating and cutaneous IgA immune complexes in patients with dermatitis herpetiformis. J Immunol. Sep 1985;135(3):1760-5. [Medline].
Hendrix JD, Mangum KL, Zone JJ, Gammon WR. Cutaneous IgA deposits in bullous diseases function as ligands to mediate adherence of activated neutrophils. J Invest Dermatol. May 1990;94(5):667-72. [Medline].
Herron M, Zone J. Dermatitis herpetiformis and linear IgA disease. Dermatology. 2003;1:479-89.
Hull CM, Liddle M, Hansen N, et al. Elevation of IgA anti-epidermal transglutaminase antibodies in dermatitis herpetiformis. Br J Dermatol. Jul 2008;159(1):120-4. [Medline].
Karpati S. Dermatitis herpetiformis: close to unravelling a disease. J Dermatol Sci. Apr 2004;34(2):83-90. [Medline].
Kumar V, Zane H, Kaul N. Serologic markers of gluten-sensitive enteropathy in bullous diseases. Arch Dermatol. Nov 1992;128(11):1474-8. [Medline].
Lang PG Jr. Sulfones and sulfonamides in dermatology today. J Am Acad Dermatol. Dec 1979;1(6):479-92. [Medline].
Marakli SS, Uzun S, Ozbek S, Tuncer I. Dermatitis herpetiformis in a patient receiving infliximab for ankylosing spondylitis. Eur J Dermatol. Jan-Feb 2008;18(1):88-9. [Medline].
Preisz K, Sardy M, Horvath A, Karpati S. Immunoglobulin, complement and epidermal transglutaminase deposition in the cutaneous vessels in dermatitis herpetiformis. J Eur Acad Dermatol Venereol. Jan 2005;19(1):74-9. [Medline].
Provost TT, Tomasi TB Jr. Evidence for the activation of complement via the alternate pathway in skin diseases. II. Dermatitis herpetiformis. Clin Immunol Immunopathol. Nov 1974;3(2):178-86. [Medline].
Prussick R, Ali MA, Rosenthal D, Guyatt G. The protective effect of vitamin E on the hemolysis associated with dapsone treatment in patients with dermatitis herpetiformis. Arch Dermatol. Feb 1992;128(2):210-3. [Medline].
Rodrigo L. Celiac disease. World J Gastroenterol. Nov 7 2006;12(41):6585-93. [Medline].
Stenveld HJ, Starink TM, van Joost T, Stoof TJ. Efficacy of cyclosporine in two patients with dermatitis herpetiformis resistant to conventional therapy. J Am Acad Dermatol. Jun 1993;28(6):1014-5. [Medline].
Weetman RM, Boxer LA, Brown MP, Mantich NM, Baehner RL. In vitro inhibition of granulopoiesis by 4-amino-4'-hydroxylaminodiphenyl sulfone. Br J Haematol. Jul 1980;45(3):361-70. [Medline].
Wozel G, Barth J. Current aspects of modes of action of dapsone. Int J Dermatol. Oct 1988;27(8):547-52. [Medline].
Yancey KB, Cason JC, Hall RP, Lawley TJ. Dietary gluten challenge does not influence the levels of circulating immune complexes in patients with dermatitis herpetiformis. J Invest Dermatol. Jun 1983;80(6):468-71. [Medline].
Yaoita H. Identification of IgA binding structures in skin of patients with dermatitis herpetiformis. J Invest Dermatol. Sep 1978;71(3):213-6. [Medline].
Zone JJ. Skin manifestations of celiac disease. Gastroenterology. Apr 2005;128(4 Suppl 1):S87-91. [Medline].
Zone JJ, LaSalle BA, Provost TT. Circulating immune complexes of IgA type in dermatitis herpetiformis. J Invest Dermatol. Aug 1980;75(2):152-5. [Medline].
Zone JJ, Meyer LJ, Petersen MJ. Deposition of granular IgA relative to clinical lesions in dermatitis herpetiformis. Arch Dermatol. Aug 1996;132(8):912-8. [Medline].

