Investigating Upper Urinary Tract Urothelial Carcinomas: A single centre 10-year experience
World Journal of Urology
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Dev, H., Poo, S., Armitage, J., Wiseman, O., Shah, N., & Al-Hayek, S. (2016). Investigating Upper Urinary Tract Urothelial Carcinomas: A single centre 10-year experience. World Journal of Urology https://www.repository.cam.ac.uk/handle/1810/255029
OBJECTIVES Evidence of the accuracy of predictive tests in confirming the presence and grade of upper urinary tract urothelial carcinomas (UUTUC) is limited. We present the largest series evaluating the diagnostic value of pre- and intraoperative parameters in the detection of UUTUC. MATERIALS AND METHODS We retrospectively analysed records of patients who underwent diagnostic ureteroscopy between 2005 and 2014 for suspected UUTUC. Preoperative workup included voided urine cytology and CT imaging. Intra-operative assessments involved ureteroscopy to directly visualise suspicious lesions, and where possible selective cytology and biopsy. Primary outcomes were the visualisation of UUTUC and histopathological confirmation of tumour. RESULTS 100/160 (63%) of patients presenting with suspected upper tract malignancy had UUTUC. Voided and selective urine cytology and CT individually predicted UUTUC with a sensitivity/specificity of 63%/67%, 76%/73% and 95%/26% respectively. 40/48 (83%) of patients who had abnormal CT and abnormal voided urine cytology had UUTUC, while 100% of those with normal CT and normal voided cytology (investigated for ongoing symptoms) were normal. Comparing endoscopic biopsy to nephrouretectomy specimen grade, 19 (46%), 18 (44%), and 4 (10%) were identical, upgraded and downgraded respectively. CONCLUSIONS Pre-operative investigations can predict UUTUCs. When these investigations were normal, the risk of UUTUC is negligible. In selective patients with abnormal investigations, ureteroscopy should be performed to confirm and predict the grade of UUTUC, in order to guide future management. Selective cytology is unlikely to signfiicantly contribute to the diagnostic workup of UUTUC.
Upper Urinary Tract Urothelial Carcinoma, ureteroscopy, cytology, endoscopic biopsy, tumour grade
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