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Year : 2022  |  Volume : 11  |  Issue : 3  |  Page : 255-258

An incidental papillary renal cell carcinoma in a unilocular renal cyst: A case report

Department of Pathology, ABVIMS and Dr. Ram Manohar Lohia Hospital, New Delhi, India

Correspondence Address:
Dr. Neha Aggarwal
Department of Pathology, Room No 323, 3rd Floor, OPD Building, Dr. Ram Manohar Lohia Hospital, Baba Kharak Singh Marg, New Delhi - 110 001
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jdrntruhs.jdrntruhs_139_21

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Cystic renal cell carcinoma (RCC) is a malignant epithelial tumor arising in a pre-existing renal cyst. The renal cyst maybe multilocular or unilocular with the latter being an even rarer occurrence. Cystic renal malignancy arising in a unilocular cyst is quite rare with only a few cases reported till date, most of which are clear cell RCCs. Literature available with regard to staging tumor nodule in a benign unilocular cyst is limited. We report a case of a 52-year-old male presenting with a single large unilocular cyst which had a small solid nodule of papillary RCC in its posterior wall which was detected on microsopy. On pathologic examination, all cases of clinically/ radiologically benign renal cysts should be examined with a high index of suspicion as a small tumor focus may be present in the form of a nodule or in the free wall of the cyst which was initially missed.

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