Definition

Renal pelvis tumors are rare kidney cancers appearing in a specific part of the kidney known as the pelvis of the kidney.

Description

The word renal means having to do with the kidneys. A part of each kidney in the human body is called the renal pelvis. The renal pelvis in each kidney is the portion of the collecting system of the kidney that empties into the ureters (tubes that carry urine from the kidneys to the bladder). Tumors of the renal pelvis are rare.

Renal pelvis tumors usually appear after an earlier condition, called renal papillary necrosis, has already developed. The tumors can be composed of any one of several different types of cells. Most commonly, these tumors are of a...