Dr. Gahine Renuka, Dr. Agrawal Apurva, Dr. Bhaskar Vanita, Dr. Siddiqui Rabia Praveen, Dr. Joshi Chandrakala


Introduction: Papillary Renal Cell Carcinoma is a neoplasm of the kidney with clinicopathologic peculiarities which present as incidental masses
discovered on imaging workup for other causes having independent origin. The reported 5-year disease-free survival is more favourable in
papillary RCC than it is in clear cell RCC Also, it has been described in association with clear cell renal cell carcinoma, sarcomatoid renal cell
carcinoma, medullary renal cell carcinoma and so on. Squamous renal carcinoma is a very rare neoplasm with a malignant course. We present a rare
case of a collision tumor of the kidney having Papillary Renal Cell Carcinoma (RCC) and Squamous Cell Carcinoma which to the best of our
knowledge, has not previously been reported.
Case Report: A 60 year old female patient presented with sudden onset of abdominal pain since
4 months. Provisional diagnosis given on the basis of radiological findings was malignant renal cell carcinoma. Final histopathological diagnosis
given was Papillary Renal Cell Carcinoma (type 1) along with extensive areas of Squamous Cell Carcinoma, moderately differentiated involving
whole of pelvicalyceal system with infiltration into renal parenchyma.
Conclusion: This case is being presented for its rarity as well as paucity of similar case in literature so far. Squamous cell carcinoma of the kidney
usually behaves aggressively. Early diagnosis and surgical treatment before the tumor has extended beyond the capsule offer the best hope of cure.


Collision tumour, Papillary renal cell carcinoma, Squamous Cell Carcinoma.  

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