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Case Rep Nephrol Dial. 2018 Apr 27;8(1):82-89. doi: 10.1159/000489088. eCollection 2018 Jan-Apr.

Transcatheter Arterial Embolization Therapy for Huge Renal Cysts: Two Case Reports.

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Nephrology Center, Toranomon Hospital, Tokyo, Japan.
Okinaka Memorial Institute for Medical Research, Tokyo, Japan.
Department of Nephrology, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Department of Nephrology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan.


We encountered 2 patients with symptomatic huge simple renal cysts. In case 1, 4,000 mL of cyst fluid was drained via a catheter, but intracystic bleeding occurred immediately afterwards. Transcatheter arterial embolization (TAE) was performed, after which the bleeding stopped, and cyst drainage was repeated successfully. After 2 years, the total cyst volume was reduced from 11,775 mL to 75.4 mL. In case 2, TAE was performed prophylactically before drainage. Subsequently, 9,400 mL of fluid was removed from multiple cysts. After 1 year, the total cyst volume was reduced from 9,215 mL to 633 mL without bleeding. Based on these 2 cases, prophylactic TAE before drainage may be useful in patients with huge renal cysts.


Cyst drainage; Simple renal cyst; Transcatheter arterial embolization

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