Papillary renal cell cystoadenocarcinoma

Papillary renal cell carcinoma (RCC) is known by the tendency to avascularity shown by angiography. More uncommon is the cystic variant of papillary RCC called cystoadenocarcinoma. The majority of papillary tumors are in stage I. The survival for papillary RCC is significantly higher than that for non-papillary RCC. CT-scan MNR, although non diagnostic, enhance the suspicion of a heterologous process in so called “complicated cysts”. US-guided percutaneous needle aspiration may be helpful to diagnose these tumours. We report 2 cases of cystodenocarcinoma and our considerations.

[Renal oncocytoma. Ultrasonographic study of 4 cases]

The authors report four cases of renal oncocytoma investigated by echography and proved by histology after surgery. Describing the clinical cases, after a brief review of the literature, the radiologic findings are analysed with particular regard to the sonographic signs that can preoperatively differentiate oncocytomas from carcinomas. The authors conclude that the only sonographic distinguishing feature is a quite characteristic central hyperechoic streak corresponding to the fibrous scar, frequently found in this benign tumor.