Intrarenal mature cystic teratoma with renal dysplasia.

The pathological gross examination of the kidney revealed a cystic mass on the outer surface measuring 6.0 cm in size. Cut surface showed a cavity filled with jelly-like material, clear fluid, and calcified material. Remaining part of the kidney was unremarkable. Microscopic examination of the cystic mass revealed presence of extensive cartilage, sebaceous glands, ciliated columnar epithelial cells, and scattered serous material. Endodermal, ectodermal, and mesodermal elements were all noted in the tumor (Figure 1). The neighboring renal parenchyma