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Primary central nervous system (CNS) non-Hodgkin's lymphoma is a rarely encountered clinical entity. Here we present a case of a primary CNS diffuse large B-cell non-Hodgkin's lymphoma developed on a previously operated and irradiated pituitary macroadenoma. DESIGN-RESULTS: A 60-year-old woman presented with muscle weakness and eye lid ptosis. Thirty years ago, she was diagnosed with a non-functioning pituitary macroadenoma requiring repeated incomplete operations and conventional radiotherapy and accompanied by partial anterior pituitary deficiency. On admission, the magnetic resonance imaging (MRI) identified a pituitary sellar mass extending into the suprasellar region, compressing the optic chiasm and invading the left cavernous sinus. Following transsphenoidal surgery, the histological investigation revealed the presence of a diffuse large B-cell non-Hodgkin's lymphoma without other loci from the systemic staging. Following chemotherapy and despite a marked resolution of the neoplastic pituitary mass in the post-chemotherapy MRI scan, the patient's course was complicated with consciousness deterioration attributed to epileptic seizures and she died of a hospital acquired infection.

Case Report: Primary pituitary non-Hodgkin’s lymphoma developed following surgery and radiation of a pituitary macroadenoma