title: A huge renal cyst mimicking ascites: a case report.
abstract: BACKGROUND
  Renal cysts are common in old patients, and usually remain untreated. Giant renal cyst measuring more than 15 cm in diameter and containing more than 1500 mls of serous fluid are rarely seen. We report a case of a 75-year-old man with a giant right renal cyst.
  
  
  METHODS
  A 75-year-old man presented with a five years history of suprapubic pain, abdominal distension. He had no urological symptoms. Physical examination revealed a distended abdomen with shifting dullness. Routine hematology, biochemistry, and serum tumor markers were within normal limits. Erroneously diagnosed as ascites on ultrasonographic examination. Abdominal paracentesis of supposed ascites was performed. The diagnosis of giant renal cyst was finally made by Computed tomography (CT) and patient underwent continuous percutaneous catheter drainage with negative pressure, whereby 8 liters of fluid were removed with negative cytology. Subsequent Computed tomography after 6 months revealed disparition of the cysts, and the patient remained asymptomatic.
  
  
  CONCLUSIONS
  Giant renal cysts are uncommon; we conclude that the CT remains the best exam in patients evaluated for giant renal cyst. This to the best of our knowledge is the largest renal cyst in the medical literature. Studies are needed with particular attention to the factors associated with renal cyst enlargement.
authors.affiliation: Department of Urology, University Hospital Center, Hassan II, FES, Morocco. riyach2@hotmail.com.
authors.forename: Omar
authors.initials: O
authors.lastname: Riyach
authors.forename: Mustapha
authors.initials: M
authors.lastname: Ahsaini
authors.forename: Karim
authors.initials: K
authors.lastname: Tazi
authors.forename: Mohammed Fadl
authors.initials: MF
authors.lastname: Tazi
authors.forename: Soufiane
authors.initials: S
authors.lastname: Mellas
authors.forename: Jalal Eddine
authors.initials: JE
authors.lastname: El Ammari
authors.forename: Abdelhak
authors.initials: A
authors.lastname: Khallouk
authors.forename: Mohammed Jamal
authors.initials: MJ
authors.lastname: El Fassi
authors.forename: Moulay Hassan
authors.initials: MH
authors.lastname: Farih
mesh_terms: D000368:Aged; D001201:Ascites / Q000175:diagnosis*; D003937:Diagnosis, Differential; D006801:Humans; D052177:Kidney Diseases, Cystic / Q000175:diagnosis*; D008297:Male; D012680:Sensitivity and Specificity; D014057:Tomography, X-Ray Computed / Q000379:methods