Eosinophilic folliculitis following allogeneic peripheral blood stem cell transplantation: case report and review.

Eosinophilic folliculitis is considered a heterogeneous group of disorders, with several clinical subsets, sharing a common histopathological appearance. Increasing numbers of cases, following bone marrow transplantation (BMT), have been reported in recent years. We herein present a case of eosinophilic folliculitis that appeared in a 26-year-old woman 5 months after allogeneic peripheral blood stem cell transplantation as treatment for eosinophilic acute leukemia. Our review of the published cases has shown that eosinophilic folliculitis in patients after BMT could be considered as a pattern of reaction related to immune dysregulation.