Recurrent, transformed non-Hodgkin's lymphoma presenting as chiasmal syndrome with hyperprolactinemia and hypopituitarism.

A 69-year-old white female with past medical history of follicular cell lymphoma presented to her local physician with new neurological findings. She was subsequently diagnosed with a pituitary lesion comprised of diffuse large B cell lymphoma. Non-Hodgkin's lymphoma (NHL) affecting the pituitary uncommonly appears as metastatic disease from a concurrent systemic lymphoma. This case represents the first case of recurrent, transformed NHL as chiasmal syndrome with hyperprolactinemia and hypopituitarism in the American medical literature.