title: Yolk sac tumor of the bladder.
abstract: A 1-year-old white boy presented with hematuria and was found to have a large polypoid bladder mass. Light and electron microscopic, and immunohistochemical diagnosis was a yolk sac (endodermal sinus) tumor. This is the first case of a primary yolk sac tumor of the bladder to be described in the English literature.
mesh_terms: D006801:Humans; D007223:Infant; D008297:Male; D008649:Mesonephroma / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*