Multiple myeloma presenting as sellar plasmacytoma and focal and segmental glomerulosclerosis – case report.

Plasma cell dyscrasias can have a heterogenous onset and, also, kidney involvement, associated with various clinical presentations. This mandates always considering plasma cell dyscrasias as a possible diagnosis when faced with a case with unusual progression. We report the case of a 44-year-old male with a sellar mass that was diagnosed first as an atypical pituitary adenoma, who later developed kidney involvement manifested as renal insufficiency and proteinuria, with a pathology report suggesting focal and segmental glomerulosclerosis. Within a year, he was diagnosed with multiple myeloma, prompting pathological reevaluation of the sellar mass and the change of diagnosis to solitary sellar plasmacytoma. [ABSTRACT FROM AUTHOR]