Kidney cancer. Gross specimen of a human kidney in a case of clear cell renal cell carcinoma. This specimen is 11 centimetres long, with the cancer (malignant tumour) at lower centre (yellow). Renal cell carcinoma (RCC) originates in the lining of the proximal convoluted tubule, the very small tubes in the kidney that transport GF (glomerular filtrate) from the glomerulus to the descending limb of the nephron. It is the most common type of kidney cancer in adults.
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