What doctors look for when checking for ovarian cancer

There is no single test that can definitively detect ovarian cancer in its early stages. Instead, doctors use a combination of physical exams, blood tests, and imaging to investigate symptoms or concerns. The process usually starts when you describe symptoms to your doctor — things like persistent bloating, pelvic pain, difficulty eating, or urinary urgency that lasts more than a few weeks.

Your doctor will ask detailed questions about when the symptoms started, how often they occur, and whether anything makes them better or worse. They will then perform a pelvic exam, feeling the ovaries and surrounding tissue to check for lumps, swelling, or other abnormalities. If your doctor finds something unusual or if your symptoms suggest ovarian cancer might be present, they will order additional tests.

Key Takeaways

  • A pelvic exam is usually the first step, where your doctor feels the ovaries and surrounding tissue for lumps or swelling.
  • A blood test called CA-125 measures a protein that is often elevated in ovarian cancer, though it can also be high with other conditions.
  • Ultrasound or CT imaging creates pictures of the ovaries and pelvis to look for cysts, masses, or other changes.
  • If imaging shows something suspicious, a biopsy — removing a small tissue sample — is the only way to confirm whether cancer is present.
  • Symptoms lasting more than two to three weeks warrant a conversation with your doctor, even if you are unsure whether they are serious.

Blood tests that may be ordered

The most common blood test for ovarian cancer is called CA-125. This test measures the level of a protein called cancer antigen 125 in your blood. Women with ovarian cancer often have elevated CA-125 levels, but so do women with other conditions like endometriosis, fibroids, or even normal menstruation. A single high result does not mean you have cancer, but a rising level over time can be a reason to investigate further.

Your doctor may also order a test called HE4 (human epididymis protein 4), which measures another protein associated with ovarian cancer. Some doctors use both CA-125 and HE4 together because the combination can be more informative than either test alone. These blood tests are not definitive — they are screening tools that help your doctor decide whether imaging or other tests are needed.

Blood tests are quick and can be done in a lab or your doctor's office. Results typically come back within a few days. If your CA-125 or HE4 levels are high, your doctor will not assume cancer is present; instead, they will usually recommend imaging to look at the ovaries directly.

Imaging tests that show what is happening inside

Ultrasound is often the first imaging test ordered. A technician moves a small probe over your lower abdomen or inserts it into the vagina to create detailed pictures of the ovaries and surrounding tissue. Ultrasound is painless, uses no radiation, and can show the size, shape, and texture of the ovaries. It can reveal cysts, solid masses, or fluid buildup that might suggest cancer.

CT scan (computed tomography) takes multiple X-ray images and combines them into cross-section pictures of the pelvis and abdomen. A CT scan can show whether cancer has spread to other organs and is often used if ultrasound finds something suspicious. You lie on a table that slides into a machine; the scan takes 10 to 30 minutes and is painless, though it does use radiation.

MRI (magnetic resonance imaging) uses magnetic fields and radio waves instead of radiation to create detailed pictures. MRI can be helpful for getting a clearer view of ovarian masses and is sometimes used when ultrasound results are unclear. The machine is loud and the scan takes 30 to 60 minutes, but it provides excellent detail without radiation exposure.

What a biopsy involves

A biopsy is the only way to confirm whether an ovarian mass is cancer. During a biopsy, a doctor removes a small sample of tissue from the ovary or mass and sends it to a lab for examination under a microscope. There are several ways to obtain a tissue sample.

Needle biopsy uses a thin needle guided by ultrasound or CT imaging to reach the mass and withdraw a small sample. This is done in a hospital or imaging center, usually with local anesthesia to numb the area. The procedure takes 15 to 30 minutes, and you can often go home the same day.

Surgical biopsy involves a small operation where a surgeon removes tissue directly. This may be done through a laparoscopy — a thin camera inserted through a small cut in the abdomen — or through a larger surgical incision. Surgical biopsy is more invasive than needle biopsy but allows the surgeon to see more of the ovary and surrounding tissue and to remove the entire mass if cancer is found.

When your doctor might refer you to a specialist

If imaging suggests ovarian cancer is present, your doctor will refer you to a gynecologic oncologist — a surgeon who specializes in cancers of the female reproductive system. This specialist will review all your test results, imaging, and blood work before deciding on the next steps. In some cases, the oncologist may recommend surgery to remove the ovary and surrounding tissue, which also serves as a definitive biopsy.

The gynecologic oncologist can also discuss staging — determining how far the cancer has spread — and treatment options. They will order additional imaging or blood work if needed to get a complete picture of the cancer before treatment begins.

What happens if results are unclear

Sometimes imaging shows a cyst or mass that could be cancer but could also be benign (non-cancerous). In these cases, your doctor may recommend watchful waiting — repeating ultrasound or blood tests at regular intervals to see whether the mass changes over time. If it stays the same size and your CA-125 levels remain stable, it is often safe to continue monitoring rather than performing a biopsy immediately.

If the mass grows, your CA-125 rises, or new symptoms develop, your doctor will move forward with biopsy or surgery. Watchful waiting can feel uncertain, but it avoids unnecessary procedures when the mass is likely benign. Your doctor will explain the reasoning and set a clear schedule for follow-up testing so you know what to expect.

Frequently Asked Questions

Can ovarian cancer be found before symptoms appear?

There is no routine screening test for ovarian cancer in women without symptoms or risk factors. Women with a strong family history of ovarian or breast cancer, or with certain genetic mutations like BRCA1 or BRCA2, may benefit from regular CA-125 testing and ultrasound, but this is not standard for all women. Talk to your doctor about your personal risk.

How long does it take to get results from a biopsy?

A pathologist examines the tissue under a microscope, which usually takes three to seven days. Your doctor will call you with results once the lab report is complete. If cancer is confirmed, your doctor will discuss next steps and may refer you to a specialist.

What if the biopsy shows it is not cancer?

If the tissue sample is benign, your doctor will discuss what the mass actually is — it could be a cyst, fibroid, or other non-cancerous growth. You may need follow-up imaging to monitor it, or no further action may be needed. Your doctor will explain the findings and any recommended follow-up care.

Do I need all these tests, or just some of them?

Your doctor will order tests based on your symptoms, exam findings, and medical history. Not everyone needs blood tests, imaging, and biopsy. The process is tailored to your situation, and your doctor will explain why each test is being recommended.

What should I do if I have symptoms that worry me?

Schedule an appointment with your primary care doctor or gynecologist. Describe your symptoms in detail, including when they started and how often they occur. Your doctor can perform an exam and order tests if needed. Many symptoms that last weeks can have non-cancerous causes, but it is important to have them evaluated.