Core Biopsies of Renal Tumors: A Study on Diagnostic Accuracy, Interobserver, and Intraobserver Variability

Diagnostic accuracy of CBs was high, with a diagnostic yield varying between 84% and 92%. Pathological subtyping of CBs was highly reproducible with the exception of the chromophobe renal cell carcinoma, which was problematic on HE-stained sections only.