|Classification and external resources|
Micrograph of a renal oncocytoma, a type of benign kidney tumour. H&E stain.
Kidney tumours (or kidney tumors), also known as renal tumours, are tumours, or growths, on or in the kidney. These growths can be benign or malignant (cancerous). They may be discovered on medical imaging incidentally (i.e. an incidentaloma), or may be present in patients as an abdominal mass, hematuria, abdominal pain, or manifest first in a paraneoplastic syndrome that seems unrelated to the kidney.
There are many forms of kidney tumours:
- The most frequent, malignant, primary kidney cancer is renal cell carcinoma (RCC) - which has several subtypes:
- Clear cell RCC.
- Papillary RCC
- Chromophobe RCC
- Collecting duct RCC
- Metastatic tumour, e.g. ovarian carcinoma.
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