Eosinophilic panniculitis triggered by arthropod bites in chronic lymphocytic leukemia.

Skin findings are common among patients with hematological malignancies and are thought to be expressions of a reactive spectrum peculiar to immunosuppressed patients with an unclear pathogenesis. Eosinophilic panniculitis is a reaction pattern defined by single or multiple lesions consisting in nodules and plaques, and sometimes in papules and pustules, characteristically associated to hematological neoplasms or to a series of benign conditions such as arthropod bites. We report a case of eosinophilic panniculitis occurring in a 77-year-old woman with chronic lymphocytic leukemia. Our case is remarkable as the histology of panniculitis was associated with a clinical evidence of dermal papules and a history of insect bites.