The word is "renal." It refers to anything related to the kidneys, such as renal function, renal failure, or renal disease.
It comes from late latin, 'Renalis' meaning "of or relating to the kidneys"
renal calculi
The word "renal" means "of or pertaining to the kidneys."
Renal damage is the same as kidney damage. Anytime you see the word "renal" it has to do with the kidneys.
pyel/o is the medical terminology combining form meaning renal pelvis
Renal pelviectasis is the medical term meaning abnormal dilation of the renal pelvis. This condition is often a sign of blockage in the urinary system.
The word 'renal' refers to the kidneys, so renal cancer would be a tumour which has started in the kidneys.
Kidneys
"renal" is the medical word for something having to do with the kidneys. So internal renal bleeding means bleeding in the kidneys.
Kidney failure is the medical term meaning loss of renal function. It may also be called end stage renal disease late in the process.
Renal function is the medical term meaning kidney function. Renal means pertaining to the kidney.