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.
blood urea nitrogen (BUN). Etymology: AS, blod + Gk, ouron, urine, nitron, soda, genein, to produce. a measure of the amount of urea in the blood. Urea forms in the liver as the end product of protein metabolism, circulates in the blood, and is excreted through the kidney in urine.lood uÂ·reÂ·a niÂ·troÂ·gen. Nitrogen, in the form of urea,in the blood; the most prevalent of the nonprotein nitrogenous compounds in blood, which normally contains 10-15 mg of urea/100 mL. Canadian clinicians often use the shortened form urea nitrogen.