title: A benign rectal ulcer penetrating into the prostate--diagnosis by prostate-specific antigen.
mesh_terms: D000368:Aged; D000951:Antigens, Neoplasm; D006801:Humans; D008297:Male; D017430:Prostate-Specific Antigen; D011469:Prostatic Diseases / Q000175:diagnosis*; D012002:Rectal Diseases / Q000175:diagnosis*; D014456:Ulcer / Q000175:diagnosis*
chemical_list: D000951:Antigens, Neoplasm; D017430:Prostate-Specific Antigen