For most types of cancer, a biopsy is the main way doctors diagnose cancer. A biopsy is the removal of a small amount of tissue for examination under a microscope. Other tests can suggest that cancer is present, but only a biopsy can make a definite diagnosis. Your doctor may recommend a biopsy if something suspicious is found during a physical exam or another test.
Blood urea nitrogen - BUN - is a blood test performed as a marker of kidney function. It is part of the basic metabolic panel done for health screening. It is also used to monitor the progression of kidney failure. BUN is produced by the breakdown of protein and usually cleared from the blood by the kidneys.
A blood urea nitrogen (BUN) test measures the amount of urea nitrogen found in your blood. BUN levels help your doctor see how well your kidneys are working. The test may be used along with other measurements to help diagnose a kidney disorder or find out how well your treatment for kidney disease is working.our doctor may also check the creatinine levels in your blood. On its own, the BUN level does little to tell your doctor about your kidney, or renal, function. But when it is measured along with creatinine levels, your doctor can look at how these two levels compare to help find out your kidney function.