ABSTRACT
Hypereosinophilic syndrome [HES] is a group of rare blood disorders characterized by a persistent elevation of blood eosinophil count >/= 1.5 * 10[9]/L and clinical manifestations attributable to eosinophilia or tissue hypereosinophilia. Lymphocytic variant of HES [HES-L] is a known subtype according to World Health Organization classification. It is well documented in the literature that patients with HES-L are predisposed to develop T-cell lymphoma. We report a case of T-cell lymphoproliferation associated with hypereosinophilia, which has been successfully treated with mycophenolate mofetil, with resolution of skin lesions and normalization of eosinophil count and immunoglobulin E level. We believe this is a clinically relevant case since this is a rare disease with little known knowledge on its best treatment modality