Beta HCG (Tumor Marker)

Function

While Human Chorionic Gonadotropin (HCG) is most famous as the 'pregnancy hormone,' its Beta subunit is also a potent tumor marker. In a non-pregnant state, HCG should be nearly undetectable. Certain tumors secrete HCG into the bloodstream, allowing it to be used for diagnosis and treatment monitoring.

Why it is Ordered

In oncology, this test is ordered to:

• Diagnose Germ Cell Tumors: It is a key marker for testicular cancer in men and certain ovarian cancers in women.
• Monitor Gestational Trophoblastic Disease: Such as hydatidiform moles or choriocarcinoma.
• Evaluate Treatment Efficacy: If a tumor is successfully removed or treated with chemo, HCG levels should drop to near zero.
• Screen for Recurrence: Routine testing post-treatment to catch a returning cancer early.

Associated Conditions

Elevated Beta HCG in a non-pregnant person can indicate seminomatous or non-seminomatous germ cell tumors, hepatoblastoma, or some lung and pancreatic cancers. It is often paired with Alpha-Fetoprotein (AFP) and Lactate Dehydrogenase (LDH) for a comprehensive 'triple marker' oncology panel.

Interpretation in Men

In men, any detectable level of HCG is considered abnormal and warrants immediate investigation for testicular malignancy.