title: Peritoneal implantation of endodermal sinus tumor of the pineal region via a ventriculoperitoneal shunt. Cytodiagnosis with immunocytochemical demonstration of alpha-fetoprotein.
abstract: A 17-year-old male developed an endodermal sinus tumor in the pineal region that metastasized to the peritoneal cavity via a ventriculoperitoneal shunt and caused ascites. Neoplasm was diagnosed by cytologic examination of the peritoneal fluid, and the precise histologic nature of the neoplasm was confirmed by immunocytochemistry, which demonstrated alpha-fetoprotein in the neoplastic cells.
mesh_terms: D000293:Adolescent; D001202:Ascitic Fluid; D001932:Brain Neoplasms / Q000175:diagnosis* / Q000473:pathology; D002557:Cerebrospinal Fluid Shunts; D003581:Cytodiagnosis; D006801:Humans; D008297:Male; D008649:Mesonephroma / Q000175:diagnosis* / Q000473:pathology / Q000556:secondary; D009366:Neoplasm Seeding; D010534:Peritoneal Neoplasms / Q000473:pathology / Q000556:secondary*; D010870:Pineal Gland; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D000509:alpha-Fetoproteins