ReviewInternational journal of molecular sciences2026
Performance of Urine Fluorescence In Situ Hybridization for Diagnosis of Upper Tract Urothelial Carcinoma: A Comprehensive Review.
Review in International journal of molecular sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
3 authors.
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Abstract
Upper tract urothelial carcinoma (UTUC) is a relatively rare malignancy, far less frequent than its counterpart in the bladder, but with a more aggressive course, worse prognosis and unique diagnostic challenges. Despite the histological and molecular similarities between upper and lower tract urothelial tumours, UTUC has many key distinct traits, both clinical and genomic, and must be viewed as a separate entity from bladder urothelial carcinoma (BUC). Ureteroscopy with biopsy is the only means to obtain tissue for histo-logical confirmation of diagnosis and more accurate tumour grading, but is not always feasible or preferable because it carries the risk of potentially severe complications. Aside from the widely available but poorly sensitive urine cytology, a large variety of urine-based diagnostics are increasingly investigated as non-invasive alternatives to ureteroscopy. Fluorescence in situ hybridization (FISH) is the most widely used molecular assay for the diagnosis and monitoring of UTUC, but has failed, as of yet, to display a comparable diagnostic accuracy to the existing gold standards of computed tomography urography (CTU) and ureteroscopy. We herein aimed to comprehensively review all published data on the performance of FISH for the detection of UTUC, in comparison to urine cytology and other assays, while further commenting on the existing challenges and future perspectives in the field of urine-based diagnostics. Across all studies (
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