title: Dramatic prostate specific antigen decrease in response to discontinuation of megestrol acetate in advanced prostate cancer: expansion of the antiandrogen withdrawal syndrome.
abstract: We report a dramatic decrease in prostate specific antigen in response to the discontinuation of megestrol acetate in a patient with progressive metastatic prostate cancer. Our case demonstrates that withdrawal responses may occur with steroidal and nonsteroidal antiandrogens.
authors.affiliation: Hematology-Oncology Services, Walter Reed Army Medical Center, Washington, D.C., USA.
authors.forename: N A
authors.initials: NA
authors.lastname: Dawson
authors.forename: D G
authors.initials: DG
authors.lastname: McLeod
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D008535:Megestrol / Q000031:analogs & derivatives* / Q000627:therapeutic use; D019290:Megestrol Acetate; D009362:Neoplasm Metastasis; D017430:Prostate-Specific Antigen / Q000097:blood*; D011471:Prostatic Neoplasms / Q000097:blood* / Q000188:drug therapy / Q000473:pathology; D013375:Substance Withdrawal Syndrome
chemical_list: D008535:Megestrol; D017430:Prostate-Specific Antigen; D019290:Megestrol Acetate