5-HIAA is a breakdown product of serotonin. The 5-HIAA test measures blood levels to help diagnose and monitors treatment for a carcinoid tumor that produces serotonin.
Heparin-induced thrombocytopenia (HIT) is a complication of treatment with heparin caused by antibodies. A test for HIT (heparin-PF4) antibody helps diagnosis HIT type II.
Chromogranin A (CgA) is released from neuroendocrine cells throughout the body. This tumor marker test is used in the management of neuroendocrine tumors.
Alcohol blood tests detect and measure alcohol use. Learn about types of alcohol blood tests, how testing is conducted, and how to understand your test results.