In certain cases of pemphigus vulgaris and of dermatitis herpetiformis the disease cannot be definitely diagnosed without years of observation. Some authors have stated that the mucous membrane is spared in dermatitis herpetiformis; however, authenticated cases have been reported in which there were oral lesions. Patients with dermatitis herpetiformis notoriously do not tolerate iodine well, either administered by mouth or used in a patch test (50 per cent potassium iodide in petrolatum), although the reaction to the test is not always positive.
Dermatitis herpetiformis in children has been reported. Gardiner cited Knowles1 as giving the following differences between dermatitis herpetiformis in children and in adults: (1) Itching is not so severe in children (50 per cent); (2) decided multiformity of eruption is usually absent in children (20 per cent); (3) grouping of the lesions is seldom found under puberty (30 per cent), and (4) pigmentation as a sequel is
WILSON DJ. DERMATITIS HERPETIFORMIS IN AN INFANT: REPORT OF A CASE. Arch Derm Syphilol. 1941;44(1):58–62. doi:10.1001/archderm.1941.01500010061011
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