Yes, CA-125 is a tumor marker primarily associated with ovarian cancer. It is a protein that is produced by cells lining the ovaries and is often elevated in individuals with ovarian cancer. However, CA-125 can also be elevated in other types of cancers, such as cancers of the fallopian tubes, endometrium, pancreas, lung, breast, and gastrointestinal tract. Additionally, CA-125 levels can be elevated in non-cancerous conditions, including endometriosis, pelvic inflammatory disease, and liver cirrhosis. It is important to note that CA-125 levels alone are not sufficient to diagnose cancer definitively, and further diagnostic tests, such as imaging scans and biopsies, are necessary to confirm the presence of cancer. A healthcare professional will interpret CA-125 results in the context of the individual's clinical presentation and other diagnostic findings.