What should you know about tumour markers for ovarian cancer?

A marker may be measured in blood and followed over time. Levels can change for reasons unrelated to cancer, including inflammation, benign ovarian conditions, or other health problems. Some ovarian cancers produce little or no measurable marker. The result therefore needs to be read with symptoms, examination, imaging, and, when appropriate, tissue analysis.

Clinicians may use marker information to help assess a known cancer, consider response to treatment, or watch for change during follow-up. A single reading is less informative than the pattern and the circumstances in which samples were taken.

Ask which marker is being tested and whether the purpose is assessment, treatment planning, or follow-up. Tell the team about pregnancy, menstrual changes, inflammation, medicines, and supplements when relevant. Keep dates and results together so the same testing method and trend can be reviewed.

Further assessment may include a pelvic ultrasound, a biopsy, or molecular testing of tumour tissue. A marker result should not be used on its own to decide on surgery or chemotherapy. Ask what finding would change the plan and when the next review will occur.

Seek prompt medical advice for persistent bloating, increasing abdominal swelling, pelvic pain, repeated vomiting, difficulty eating, unusual bleeding, or a sudden change in bowel or bladder habits. Get urgent help for severe pain, fainting, heavy bleeding, or inability to keep fluids down. These symptoms need assessment even if a marker result is reassuring.

Which marker is being measured, and why is it useful in my situation? Could another condition affect the result? How will the result be combined with imaging or tissue findings? If the value changes, what will happen next, and when should it be repeated?