title: A nonclassifiable anaplastic tumor of the esophagus.
abstract: A highly malignant, anaplastic tumor of the esophagus in a middle-aged man is described. Despite critical examination of biopsy material by several pathologists, the tumor was deemed to be anaplastic and sarcomatous but otherwise unclassifiable. Despite prompt diagnosis following admission, the tumor metastasized and the patient rapidly died.
mesh_terms: D000708:Anaplasia; D004938:Esophageal Neoplasms / Q000145:classification* / Q000175:diagnosis; D006801:Humans; D008297:Male; D008875:Middle Aged