Eosinophilic Dermatosis Associated with Haematological Malignancies: A Report of Two Cases

Hematologic malignancies can be associated to dermatological manifestations, with two possible etiopathogenetic mechanisms: a direct invasion of skin by neoplastic cells or a paraneoplastic phenomenon. The eosinophilic dermatosis can be included in the latter class and arc a group of polymorphous dermatitis, clinically characterized by papules, plaques, nodules or vescico-bullous lesions, mainly involving sun-exposure sites. Clinical pictures are similar to an insect bite reaction, but in most cases the patients deny any arthropod contacts. Therefore, they arc now considered as a hypersensitive reaction to different stimuli induced by lymphoproliferative malignancies and the associated immune-deficient state. Herein, we describe two cases of patients affected by a non-Hodgkin lymphoma (NHL), in whom a diagnosis of insect bite-like reaction (IBLR) was made.