Research Article: Evaluation of the clinical behavior of unclassified renal cell carcinoma and its imaging findings on computed tomography and magnetic resonance imaging based on World Health Organization (WHO) 2022
Introduction:
Renal cell carcinoma (RCC) is an important urological pathology. As a malignant tumor, RCC is classified into many subtypes that markedly impact the prognosis [1]. Unclassified RCC in World Health Organization (WHO) 2016 includes renal tumors that do not fit any of the identified histological subtypes [2, 3]. As a rare subtype, unclassified RCC represents 2–6% of renal epithelial tumors in adults [4]. Compared to the 14 subtypes in WHO 2016, WHO 2022 divides RCC pathologically into six groups and classifies 22…
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