A 38-year-old woman presented with flexural lesions of 4 days duration
, accompanied by pruritus in her hands, arthralgia, sore throat, and a
38 degrees C fever. Examination revealed macular purpuric lesions wit
h a tendency to be grouped into plaques that affected, in a selective
way, the axillary folds (Fig. 1), the elbow flexures, and the inguinal
(Fig. 2) and perianal areas. Inflammatory laterocervical and submandi
bular lymphadenopathy was noted. Histopathologic examination showed a
normal epidermis and a perivascular lymphocytic infiltrate in the papi
llar dermis, consisting of eosinophils and extravasated red cells. Vas
culitis and other signs of vascular damage were not observed. A Congo
red stain was negative. Laboratory tests showed moderate lymphocytosis
with 2% atypical lymphocytes and mild elevation of serum glutamic-oxa
loacetic transaminase (SGOT) and serum glutamic pyruvic transaminase (
SGPT). Coagulation studies, urinalysis, immunoglobulins, and serum ele
ctrophoresis were normal. Cryoglobulins were negative. Serology for cy
tomegalovirus (CMV), toxoplasma, rubella, and human parvovirus B19 sho
wed findings of past infection. Serology for A, B and C hepatitis viru
s was negative. Mono-spot test was negative and the Epstein-Barr virus
(EBV specific antibody response is shown in Table 1. The standard Tru
e-test was negative. The clinical manifestation cleared spontaneously
within 15 days.