Linfoma esplénico de zona marginal como causa de esplenomegalia masiva: reporte de caso clínico y revisión de la literatura / Splenic marginal zone lymphoma as cause for massive splenomegaly: a clinical case and literature review

ABSTRACT

Massive splenomegaly is in the which the growth of the spleen has spread to other quadrants of the abdomen. It is produced by a limited number of pathologies, both benign and malignant. It is presented a case of a 62 year-old woman who is consulting for four years of progressive increase in her abdominal volume, associated to the feeling of abdominal fullness, dyspnea on moderate exertion and lower extremities edema. At the physical examination was observed massive splenomegaly and jaundice. The hemogram showed pancytopenia and a lymphocyte count of80 percent. The myelogram revealed marrow infiltration by lymphocytes of mature appearance. Flow cytometry of peripheral blood showed 70 percent of lymphocytes, which expressed B cells markers CD19, CD20, CD23and FMC7 in addition to Kappa light chain restriction, suggesting marginal splenic zone lymphoma. The bone marrow biopsy showed lymphoid small cells infiltrate with positive markers CD20, CD5,CD23 and negative cyclin D1 study. BCL-2 was also positive. It was considered unfit to receive chemotherapy and was treated with 4 cycles of rituximab, with significant decrease of splenic size.