What are the ways to test cholangiocarcinoma?

Numerous. Cholangiocarcinoma is usually suspected when the eyes turn yellow or blood tests show abnormal liver function. The next step is an ultrasound or ct scan. A nuclear scan may also be done. The best test is a biopsy, done when tests are highly suspicious or unrevealing.
Cholangiocarcinoma. Typically with imaging eventually followed by tissue sampling, ERCP or eus.