Synchronous choroid plexus papilloma of the fourth ventricle and ependymoma of the filum terminale: case report.
BACKGROUND
We report the first case of synchronous choroid plexus papilloma of the fourth ventricle and myxopapillary ependymoma of the filum terminale. Both are papillary World Health Organization grade I tumors known to disseminate via cerebrospinal fluid pathways.


METHODS
A 65-year-old man presented with an incidental mass in the fourth ventricle found on a computed tomography scan of the head after a motor vehicle collision and an intradural mass of the filum terminale. The patient underwent resection of the fourth ventricle mass. After pathological diagnosis of a choroid plexus papilloma, the patient underwent resection of the spinal cord tumor.


CONCLUSIONS
This case underscores the need for separate pathological diagnosis in a patient with an intradural spine lesion in the context of a benign intracranial lesion. We detail a panel of immunohistochemical markers essential for distinguishing the 2 papillary neuroectodermal tumors recovered in this case.
Bollo
Robert J
RJ
Department of Neurosurgery, New York University School of Medicine, NYU Langone Medical Center, New York, New York, USA. robert.bollo@hsc.utah.edu
Zagzag
David
D
Samadani
Uzma
U
D000368:Aged; D002420:Cauda Equina / Q000473:pathology / Q000601:surgery*; D016545:Choroid Plexus Neoplasms / Q000175:diagnosis / Q000601:surgery*; D004806:Ependymoma / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis / Q000601:surgery*; D010524:Peripheral Nervous System Neoplasms / Q000175:diagnosis / Q000601:surgery*; D016896:Treatment Outcome