title: Esophageal cancer: a cause of pyrexia of unknown origin.
mesh_terms: D002294:Carcinoma, Squamous Cell / Q000150:complications*; D004938:Esophageal Neoplasms / Q000150:complications*; D005335:Fever of Unknown Origin / Q000209:etiology*; D006801:Humans; D008297:Male; D008875:Middle Aged