title: Prostatic duct adenocarcinoma: clinical characteristics, treatment options, and outcomes - a Rare Cancer Network study.
abstract: BACKGROUND
  To evaluate the clinical characteristics, contemporary treatment options, and outcome of prostatic duct adenocarcinoma (PDA), we initiated a Rare Cancer Network (RCN) study.
  
  
  METHODS
  Six member institutions of the RCN collected clinical data on 31 patients. Treatment consisted of definitive radiotherapy in 14 patients and radical prostatectomy in 16 patients. One patient was treated with androgen deprivation alone. The mean follow-up period was 56 months.
  
  
  RESULTS
  Of the 14 patients managed with radiotherapy, 1 patient developed bone metastases and died of prostate cancer, and 1 patient had a biochemical relapse 8 years after definitive radiotherapy. Of the 16 patients who underwent radical prostatectomy, 2 patients developed bone metastases, one of who died of disease. Three patients that relapsed after prostatectomy were successfully salvaged with radiotherapy. The patient that was treated with androgen deprivation alone developed bone metastases at 10 months, was treated with chemotherapy, and was alive after 22 months.
  
  
  CONCLUSIONS
  Our results suggest that PDA is a cancer with a behavior similar to that of high Gleason grade acinar carcinoma. Good local control can be achieved by either radiation or surgery. Postoperative radiotherapy seems to work as an adjuvant or salvage treatment, and most tumors appear to respond to androgen deprivation.
authors.affiliation: Istanbul Bilim University, School of Medicine, Department of Radiation Oncology, Istanbul, Turkey. sefikigdem@gmail.com
authors.forename: Sefik
authors.initials: S
authors.lastname: Iğdem
authors.forename: Daphna Y
authors.initials: DY
authors.lastname: Spiegel
authors.forename: Jason
authors.initials: J
authors.lastname: Efstathiou
authors.forename: Robert C
authors.initials: RC
authors.lastname: Miller
authors.forename: Philip M P
authors.initials: PM
authors.lastname: Poortmans
authors.forename: Sedat
authors.initials: S
authors.lastname: Koca
authors.forename: Diclehan
authors.initials: D
authors.lastname: Kiliç-Unsal
authors.forename: Sait
authors.initials: S
authors.lastname: Okkan
authors.forename: Anthony
authors.initials: A
authors.lastname: Zietman
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D044584:Carcinoma, Ductal / Q000175:diagnosis* / Q000628:therapy*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011471:Prostatic Neoplasms / Q000175:diagnosis* / Q000628:therapy*; D016896:Treatment Outcome