LAUSR

A woman in her mid-20s presented with a 6-month history of worsening headaches, amenorrhea, and nausea. Neurologic examination demonstrated word-finding difficulties, mild right-sided weakness of the upper and lower extremities, and mild right-sided neglect. Imaging revealed a complex, cystic, heterogeneously enhancing mass in the left lateral ventricle extending to the foramen of Monro (figure). Pathology after surgical resection was consistent with a central neurocytoma. This benign tumor, comprising 0.25%–0.5% of all brain tumors, typically affects young adults and arises from subependymal neural progenitor cells. Treatment consists of surgery and radiation therapy, and generally carries a favorable prognosis.1,2