Communicating hydrocephalus following stereotactic radiosurgery for periventricular meningiomas: illustrative cases.

Background: Stereotactic radiosurgery (SRS) is a well-established option for the management of intracranial tumors, including meningiomas. Although valued for its low invasiveness and precision, it still carries a risk of complications. Communicating hydrocephalus is a serious, albeit rarely reported, complication of SRS.

Rheumatoid Meningitis.

Background: Rheumatoid meningitis is a rare manifestation of autoimmune rheumatoid arthritis.

Case Description: A 70-year-old man with rheumatoid arthritis had presented with speech difficulties and limb weakness. Magnetic resonance imaging of his brain demonstrated diffuse meningeal enhancement.