[Eosinophilic pustular folliculitis and Ofuji disease. A case report].

We describe the case of a young man of Calabrian origin, who came to our observation for the appearance of erythematous pustular, intensely itching, lesions on the arms, trunk and, in a less extent, on the face. The blood count revealed a differential cell count of 16.8% eosinophils. Serum IgE levels were elevated (1000 IU/ml), and T cell subsets showed an increase in CD8+ and a decrease in CD4+ with an inversion of CD4+/CD8+ ratio (= 0.78). The result of the following investigations were either normal or negative: anti-(ds)DNA antibody, anti-nuclear antibody, anti-smooth muscle antibody, anti-striated muscle antibody, serological tests for viral, bacterial, fungal and parasitic diseases and cultural examination of the material from lesion. Histopathological examination of a biopsy specimen from the left arm showed the presence of abundant perivascular inflammatory infiltrate in the dermis and inflammatory infiltrate, with numerous eosinophils, around sebaceous glands. Taken together, all these data suggest the diagnosis of eosinophilic pustular folliculitis, a dermatosis of unknown etiology, with a histopathological picture identical to Ofuji's disease. Eosinophilic pustular folliculitis can be associated with HIV infection or haematological diseases (as non-Hodgkin lymphomas, myeloma, etc.); it was also reported in adult immunocompetent healthy individuals and in children. On the basis of our findings, we propose that this case should be classified as an idiopathic form, as we were not able to demonstrate any associated disease.