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- Title
Progression rate in Bosniak category IIF complex renal cysts.
- Authors
de Vasconcelos Chambi Tames, Amanda; Nunes Fonseca, Eduardo Kaiser Ururahy; Yamauchi, Fernando Ide; Messaggi Arrais, Gabriela Maia Soares; de Andrade, Thais Caldara Mussi; Baroni, Ronaldo Hueb
- Abstract
Objective: To evaluate progression rate of Bosniak category IIF complex renal cysts and the malignancy rate among surgically resected cysts. Materials and Methods: We performed a database search for complex renal cysts classified as Bosniak category IIF on computed tomography or magnetic resonance imaging between January 2008 and April 2016. Follow-up examinations (computed tomography or magnetic resonance imaging) were used in order to evaluate progression (Bosniak category reclassification) and stability, the latter being defined as remaining stable for a minimum of six months. Pathology reports were used as the reference to assess the malignancy rate of surgically resected cysts. Results: A total of 152 cysts in 143 patients were included in the final analysis. Seven cysts (4.6%) were reclassified on follow-up studies, and mean time to progression was 20 months (range, 1 month to 4 years). Three cysts were surgically resected. All three were diagnosed as low-grade malignant renal cell carcinomas (RCCs): one clear cell RCC and two papillary RCCs. The remaining 145 cysts remained unchanged after a mean follow-up period of 28 months (range, 6 to 118 months). Conclusion: The progression rate in Bosniak category IIF cysts was low. Even lesions that were upgraded on follow-up remained stable, indicating an indolent behavior. Our data support the idea of conservative management of Bosniak IIF renal cyst.
- Subjects
BLACKBERRY Ltd.; CYSTIC kidney disease; MAGNETIC resonance imaging; RENAL cell carcinoma; CONTRAST-enhanced ultrasound; COMPUTED tomography
- Publication
Radiologia Brasileira, 2019, Vol 52, Issue 3, p155
- ISSN
0100-3984
- Publication type
Article
- DOI
10.1590/0100-3984.2018.0038