I have 1.5cm hypodense mass lesion in the left kidney. Appearing echogenic on ultrasound with no CT demonstrable fat attenuation within? Renal cell carcinoma? Angiomyolipoma. Then I take biopsy Biopsy result as A1 to A3 renal cortical tissue A4 sections reveal a tumour composed of papillae lined by a single layer of small cells with scant cytoplasm with mild nuclear pleomorphism. The papillae have delicate fibrovascular core Foam cell clusters are seen in an occasional area finally result concludes as papillary neoplasm of kidney pls explain what problem I have sir I am now afraid of cancer.