• Orla Cullivan, Ruby Wong, Cristian Albu, Frank D'Arcy, Eoin O'Malley, Peter McCarthy, and Catherine M Dowling.
• Department of Urology, Galway University Hospital, Galway, Ireland. orla.cullivan@gmail.com.
• Ir J Med Sci. 2022 Dec 1; 191 (6): 277127752771-2775.

BackgroundThe Bosniak classification is a CT classification which stratifies renal cysts based on imaging appearances and therefore associated risk of malignancy. Bosniak IIf cysts are renal which have complex features and therefore require surveillance.AimsThe aim of this study is to assess the economic and workload burden of diagnosing and following up Bosniak IIf cysts on the urology service in a tertiary hospital in the West of Ireland.MethodsAll patients with a diagnosis of Bosniak IIf renal cysts attending our urology service between 1st of January 2012 and 31st December 2020 were analysed. The following data were collected: number and modality of follow up scans, number of MDT discussions, number and type of outpatient appointments, surgical intervention, and length of follow up. Financial data were provided by the hospital finance department.ResultsOne hundred and sixty-two patients were included. Total cost of follow up was €164,056, costing €1,012.7 per patient. Cost of outpatient visits was €77,850. Follow-up length ranged from 1 to 109 months, median follow up time 17.5 months. Overall cost of imaging was €74,518. There were a total of 80 MDT discussions at an overall cost of €11,688.ConclusionsThis study demonstrates that surveillance of patients with Bosniak IIf renal cysts represents a significant burden upon both radiology and urology services. Surveillance for these patients could be streamlined in the future through a number of initiatives such as virtual OPDs and dedicated MDTs.© 2022. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.

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