Eosinophilic dermatosis in a patient with chronic lymphocytic leukemia: a rare case report.

Chronic lymphocytic leukemia (CLL) is a type of malignant lymphoproliferative disorder characterized by a rapid and uncontrolled increase in lymphoid cells, mostly monoclonal B-cells (B-CLL). Patients with CLL may present cutaneous lesions that can be classified as either "specific" or "non-specific." In CLL patients, specific skin eruptions arise from leukemic cell infiltration, recognized histopathologically in tissue sample biopsy. Non-specific lesions encompass the majority of eruptions in CLL patients and may present as petechiae, purpura, urticaria, exfoliative dermatitis, paraneoplastic pemphigus, vasculitis, or eosinophilic dermatosis. Eosinophilic dermatosis of hematologic malignancy (EDHM) is a rare cutaneous manifestation that presents as an eruption in various locations and is characterized as papular, pruritic, and sometimes vesicular or vesiculobullous. Here we present a rare and interesting case of a 58-year-old woman with a medical history of B-CLL that was examined at our clinic for evaluation of an unspecified diffuse vesicular pruritic rash. The patient was first diagnosed with CLL 3 years earlier and followed a 6-month course of immuno-chemotherapy with rituximab, fludarabine, and cyclophosphamide. We also performed brief review of previous literature and present the results.