title: Castleman Disease Presenting as Renal Hilar Mass.
abstract: BACKGROUND
  We report a case of unicentric Castleman disease, a rare type of benign proliferation of lymphoid tissue. We present an uncommon disease that was managed effectively using laparoscopy.
  
  
  METHODS
  A 32-year-old woman presented with left-sided flank pain. A large retroperitoneal mass was detected in the left renal hilum close to the renal vessels. Laparoscopic removal of the mass was effectively performed. The pathologic examination was in favor of a rare type of benign proliferation of lymphoid tissue compatible with Castleman disease. The patient was cured with no evidence of recurrence in 1-year follow-up.
  
  
  CONCLUSIONS
  Transperitoneal laparoscopic approach is feasible and effective in the management of this disease and is curative.
authors: Department of Urology, Labbafinejad Hospital, Shahid Beheshti University of Medical Sciences , Urology and Nephrology Research Center, Tehran, Iran .
authors: Mohammad Hadi
authors: MH
authors: Radfar
authors: Department of Urology, Shahid Bahonar Hospital, Kerman University of Medical Sciences , Kerman, Iran .
authors: Hamid
authors: H
authors: Pakmanesh
authors: Department of Pathology, Labbafinejad Hospital, Shahid Beheshti University of Medical Sciences , Tehran, Iran .
authors: Peyman
authors: P
authors: Torbati