A Rare and Unusual Renal Tumour: A Case Report

Abstract

Introduction: Multilocular cystic renal cell neoplasm of low malignant potential is a rare histologically identified form of clear cell renal cell carcinoma included in 2016 Renal tumour classification of WHO. It is a low risk neoplasm with clear cells that have less expansile proliferation than other clear cell variants of renal cell carcinoma with no recurrence and metastasis with few exceptional cases. The incidence of multilocular cystic renal cell carcinoma is estimated to be 1-2 percent.6,12 Although the WHO classification of multilocular cystic renal cell carcinoma with low malignant potential was reported in 2004. The WHO 2016 categorization of renal cell tumour has been assessed as a special entity with no documented cases of metastasizing and recurrent tumour development.4 We present a rare clinical case of multilocular cystic renal cell neoplasm with low malignant potential, which should not be mistaken with other differential diagnoses such as cystic necrosis in conventional renal cell carcinoma, tubulo cystic renal cell carcinoma, multilocular cystic nephroma, clear cell variant of renal cell carcinoma and other benign multilocular renal tumors.