Simultaneous hepatosplenic T-cell lymphoma and myelofibrosis.

Hepatosplenic T-cell lymphoma (HSTL) is a rare T-cell neoplasm of the lymphoid system. This type of lymphoma is characterized by sinusoidal infiltration of spleen, liver, bone marrow and lymph nodes by neoplastic lymphocytes. Here, we discuss a patient who had a left axillary lymph node biopsy with characteristic histological and immunohistochemical features of HSTL. In addition, infiltrating neoplastic T-cells and simultaneous characteristic features of myelofibrosis (MF) were also present in the bone marrow biopsy specimen. In contrast to secondary MF, primary MF is a progressive disease and may significantly affect the prognosis of coexisting HSTL. There are few reports in the literature talking about mild bone marrow fibrosis in association with T cell lymphoma, however marked increase in bone marrow fibrosis and HSTL never being reported. This case is shedding light on HSTL and marked increase in bone marrow fibrosis.