RETROSPECTIVELY, that form of pemphigus which has come to be known by the eponym of Senear-Usher syndrome or more formally as pemphigus erythematosus,* was first presented by Ormsby and Mitchell1 as a case for diagnosis at a meeting of the Chicago Dermatological Society in 1921. In 1925, before the American Dermatological Association, Senear and Usher analyzed 11 similar cases and described the salient features of the condition which has since borne their names.2 Their original description was of a dermatosis involving chiefly or exclusively the head and trunk. The clinical picture embraced features of both lupus erythematosus and pemphigus. The lesions were present on the trunk, usually in the areas involved in seborrheic dermatitis; they were flaccid bullae that ruptured readily and, on their sites, developed scales and crusts that were thick and dry or greasy.Since this original description, many articles have been written about the clinical and histologic picture, the nosologic features, and treatment of pemphigus erythem¬ atosus. Many observers now believe that pemphigus erythematosus is a localized form of pemphigus foliaceus. However, there are still many others who think that it is a variety of pemphigus vulgaris and even¬ tually progresses into the common form of pemphigus.3'5 A case of pemphigus erythematosus is re¬ ported below for the following reasons: (1) to show the age of the patient, which was less than 6 years at onset, (2) to show the effects of Jamarsan paint and a concentrat¬ ed topical fluocinolone acetonide prepara-The patient was a 6-year-old, white Jewish girl when first seen 14 months ago. According to her mother she began to develop "pimples" on the back several months before. The lesions were thought to be insect bites. When they did not disappear within a period of several weeks, the mother consulted several physicians who prescribed topical steroids and antibiotics. No benefit resulted and the lesions continued to appear sporadically and randomly on the back, chest, scalp, and extremities (Fig 1).When the patient was hospitalized one month later, on Feb 25, 1965, examination showed a widespread eruption on the neck, back, face, chest, and extremities of 1-to 6-cm sized, irreg¬ ularly bordered, erythematous, slightly moist, crusted plaques. A positive Nikolsky sign was present. The scalp was completely covered with thick, whitish, adherent scales (Fig 2). There were no lesions on the mucous membranes.The biopsy of an early vesicular lesion showed an area of intra-epidermal cleavage located underneath the granular layer and forming a flaccid bulla. It contained groups of polymorphonuclear leukocytes and very few isolated or grouped acantholytic cells. The underlying layers of the epidermis showed in¬ tercellular edema. The upper dermis showed a mild perivascular inflammatory infiltrate formed by lymphocytes, histiocytes, and a few polymorphonuclear leukocytes. The microscopic picture was compatible with signs of pemphi¬ gus erythematosus (Fig 3).The biopsy of an older crusted lesion sh...