NCIt definition : A carcinoma arising from the epithelium of the renal parenchyma or the renal pelvis.
The majority are renal cell carcinomas. Kidney carcinomas usually affect middle aged
and elderly adults. Hematuria, abdominal pain, and a palpable mass are common symptoms.;
Alternative definition : NCI-GLOSS: Cancer that forms in tissues of the kidneys. Kidney cancer includes renal
cell carcinoma (cancer that forms in the lining of very small tubes in the kidney
that filter the blood and remove waste products) and renal pelvis carcinoma (cancer
that forms in the center of the kidney where urine collects). It also includes Wilms
tumor, which is a type of kidney cancer that usually develops in children under the
age of 5.;