A Case of Pituitary Macroadenoma Presenting as Aseptic Meningitis.

Pituitary adenomas are a common brain tumor that are frequently asymptomatic but may initially present with vision deficits or very rarely as meningitis thought to be due to cerebrospinal fluid leakage. In this case report we discuss the initial presentation of a pituitary macroadenoma as aseptic meningitis, particularly in the absence of an identifiable cerebrospinal fluid leak. We also discuss the workup and diagnostic challenges associated with this atypical presentation, including findings on imaging and pertinent laboratory results.