Bhavya P.Mohan - Dept. of Pathology, Government Medical College, Kottayam, Kerala, India
Jayalakshmy PL - Dept. of Pathology, Government Medical College, Kottayam, Kerala, India
V Letha - Dept. of Genitourinary Surgery, Government Medical College, Kottayam, Kerala, India
Suresh Bhat - Dept. of Pathology, Government Medical College, Kottayam, Kerala, India

Sarcomatoid carcinoma is a high‑grade rare malignant tumor with both epithelial and mesenchymal components. Sarcomatoid carcinoma in the upper urinary tract is very rare. We reported here a case of sarcomatoid carcinoma of renal pelvis with osteosarcomatous differentiation, with involvement of the ureter and renal parenchyma in a 68-year-old female. Histologically, predominant pleomorphic spindle cell sarcoma component with osteoid production and urothelial carcinoma component with in situ areas were identified. Immunohistochemical analysis showed vimentin positivity in sarcomatous component and cytokeratin positivity in carcinomatous component.

Sarcomatoid Carcinoma, renal pelvis, Osteosarcoma