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Kidney cancer

Kidney (renal cell) cancer originates mainly from proximal tubular epithelial cells, but also from cells from intercalated and medullary collecting ducts. There are multiple types of kidney cancer, but clear cell renal cell carcinoma is the most common (around 85%). The histological subgroups are chromophobe and papillary renal cell carcinoma, often with a percentage of malignant mesenchymal cells (sarcomatoid differentiation) (2).

Incidence

In 2013, there were 760 new cases of kidney cancer registered in Norway, of which 533 were men and 227 women. Kidney cancer occurs most commonly in the age group 50–70 years, and constitutes about 3% of the total number of newly diagnosed cancer cases. The incidence is more common in men than women (1).

From 1957 to 2013, a gradual increase in incidence of kidney cancer has been registered in Norway, especially among men. The increase is considered genuine despite correction for the improvement in diagnostics due to CT and ultrasound (2).

 

Age-specific incidence of kidney cancer (not including renal pelvis), 2009–2013.

Source: Cancer Registry of Norway

 

 

Incidence of kidney cancer (not including renal pelvis), 1954–2013.

Source: Cancer Registry of Norway

 

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