Ovarian Cancer Ultrasound: Preparation, Procedure and Results

An ovarian cancer ultrasound is a pelvic imaging test that can identify an ovarian mass or cyst and describe features that may need further assessment. It is an important first step, but ultrasound findings alone cannot confirm or rule out ovarian cancer.

Ovarian cancer ultrasound: what it can and cannot show

An ovarian cancer ultrasound is usually a pelvic ultrasound performed when a person has symptoms, a pelvic examination finding, an ovarian cyst, or a higher-than-average risk of ovarian cancer. It creates images of the ovaries, uterus, fallopian tube region and surrounding pelvic tissues using high-frequency sound waves. The examination may be done through the abdomen, through the vagina, or by using both approaches.

Ultrasound can show whether an ovary appears enlarged and whether a mass is fluid-filled, solid, or mixed. It can also identify details that help clinicians assess risk, such as thick walls, internal partitions, solid areas, small growths inside a cyst, fluid in the abdomen, or blood flow patterns. These features guide whether monitoring, specialist review, blood tests, or further imaging may be appropriate.

It is important to understand the limits of the test. A benign cyst can sometimes look complex, and an early or small ovarian cancer may not be visible or may not have distinctive features. A diagnosis of cancer requires careful assessment by a specialist and, when indicated, tissue analysis after surgery or biopsy. For broader information about the disease, see ovarian cancer.

Who may need a pelvic ultrasound

A clinician may recommend an ovarian ultrasound for persistent symptoms that could be linked to an ovarian or pelvic condition. These can include ongoing bloating or abdominal swelling, pelvic or lower abdominal discomfort, feeling full quickly, changes in urinary frequency, unexplained changes in bowel habits, or abnormal vaginal bleeding. These symptoms are common and often have non-cancerous causes, but persistence or progression deserves medical review.

The test may also be used after a pelvic examination suggests an enlarged ovary or mass, when an ovarian cyst has been found on another scan, or to monitor a previously identified cyst. In people who have been through menopause, a new ovarian mass may be assessed particularly carefully because the approach to ovarian cysts can differ after menopause.

Ultrasound is not a routine screening test for ovarian cancer in people at average risk who do not have symptoms. It has not been shown to reliably reduce deaths from ovarian cancer when used as population screening. People with a strong family history of ovarian, breast, pancreatic, or prostate cancer, or a known inherited gene change, should discuss individualized risk assessment and surveillance with a doctor or genetic counselor.

How an ovarian cancer ultrasound works

Ultrasound works by sending sound waves into the body through a handheld device called a transducer. The waves reflect differently from fluid, soft tissue and solid structures. A computer converts these returning echoes into real-time images that a sonographer and radiologist can assess.

A transabdominal pelvic ultrasound is performed over the lower abdomen and gives a broad view of the pelvis. A transvaginal ultrasound uses a slim, covered transducer placed gently into the vagina. Because it sits closer to the ovaries and uterus, it often provides more detailed images. A transvaginal scan does not pass through the cervix or enter the uterus.

Color Doppler may be used during either examination to evaluate blood flow in and around an ovarian mass. Blood flow findings are interpreted together with the mass’s structure, symptoms, age, menstrual status and other test results. Doppler alone cannot determine whether a mass is cancerous.

How should I prepare for an ovarian ultrasound?

Preparation depends on the type of pelvic ultrasound planned. For a transabdominal scan, the imaging center may ask the patient to arrive with a comfortably full bladder. This can move bowel loops away from the pelvis and improve the view. Instructions commonly include drinking water before the appointment and avoiding urination until after that part of the examination, but the exact amount and timing should follow the facility’s directions.

For a transvaginal scan, an empty bladder is generally preferred. If both scan types are planned, the abdominal portion is commonly performed first, followed by emptying the bladder before the internal scan. No special diet is usually necessary unless the imaging team provides different instructions.

The patient should tell the team about pregnancy or possible pregnancy, current pelvic pain, vaginal bleeding, latex allergy, recent pelvic procedures, and any concern about an internal examination. A transvaginal ultrasound is optional: a patient may ask questions, request a chaperone where available, pause the procedure, or decline it. A transabdominal examination can still be performed, although it may provide less detail.

What not to do before a pelvic ultrasound?

Patients should not empty their bladder before a transabdominal pelvic ultrasound if they have been instructed to arrive with a full bladder. Doing so may reduce image quality and could mean waiting while the bladder refills. However, they should not force themselves to drink excessive amounts of fluid or tolerate significant pain; the imaging center can advise if discomfort becomes difficult.

For a transvaginal ultrasound, patients are usually asked to empty the bladder immediately before the scan. They should avoid using vaginal creams, lubricants, douches, or medications inside the vagina shortly before the appointment unless a clinician has told them to use them. Douching is not recommended as a routine hygiene practice because it can irritate the vagina and affect its normal balance.

There is usually no need to fast, stop regular medicines, or avoid normal activities before a pelvic ultrasound. Bringing prior imaging reports, relevant blood-test results, and a list of medicines can help the clinical team compare findings and plan appropriate follow-up.

What happens during the procedure and recovery?

At the appointment, the patient may change into a gown and lie on an examination bed. During a transabdominal scan, gel is placed on the lower abdomen and the sonographer moves the transducer across the skin. Mild pressure may be needed to obtain clear pictures, particularly with a full bladder.

For a transvaginal scan, the transducer is covered and lubricated before being inserted a short distance into the vagina. The patient may feel pressure or mild discomfort, but the test should not be sharply painful. Communicating discomfort promptly allows the sonographer to adjust the examination. The imaging portion commonly takes about 15 to 30 minutes, though timing varies if both approaches are used or additional views are needed.

Recovery is immediate. Patients can generally return to eating, work, travel, exercise and usual medicines straight away. There is no radiation exposure and no sedation. Minor, short-lived discomfort can occur from pressure on a full bladder or from the internal examination, but significant after-effects are not expected.

Does ovarian cancer always show up on an ultrasound?

No. Ovarian cancer does not always show up on an ultrasound, especially when it is very small, located in a difficult-to-view area, or has an appearance that overlaps with a benign condition. Conversely, an ultrasound finding that looks concerning does not automatically mean cancer is present.

When a mass is seen, a radiologist may describe its size, whether it is simple or complex, the presence of solid components, and any associated abdominal fluid. The clinician then considers the full clinical picture. Depending on the findings, next steps may include repeat ultrasound after a period of observation, a blood test such as CA-125 in selected patients, MRI or CT imaging, or referral to a gynecologist or gynecologic oncologist.

CA-125 is not a stand-alone diagnostic test. It can be raised in ovarian cancer but also in many non-cancerous situations, including endometriosis, fibroids, pelvic infection, menstruation, pregnancy and liver disease. Specialist assessment is particularly important when imaging and symptoms suggest a higher risk.

How long does it take to get ultrasound results for an ovarian cyst?

Preliminary observations may sometimes be discussed on the day of the examination, but the official result is usually issued after a radiologist reviews the images. Timing depends on the imaging center, the need for comparison with earlier scans, and whether the result requires urgent communication. The clinician who ordered the scan should explain how and when results will be shared.

If the scan shows a simple cyst with reassuring features, the report may recommend no further action or a repeat scan after an interval, depending on the patient’s age, symptoms and menopausal status. Complex, large, persistent or changing cysts may require earlier follow-up or specialist review. The report is one part of decision-making, not a diagnosis by itself.

Patients should ask which type of cyst or mass was seen, its size and key features, whether follow-up imaging is needed, and what symptoms should prompt earlier contact. Keeping planned follow-up appointments matters because changes over time can provide useful information.

Benefits, possible risks and when to seek medical care

The main benefits of an ovarian ultrasound are that it is noninvasive, uses no ionizing radiation, is widely available, and can provide detailed information about pelvic anatomy. It can help distinguish a simple fluid-filled cyst from a more complex mass and supports timely referral when further assessment is needed. Its principal limitation is that it cannot definitively diagnose ovarian cancer.

Risks are low. The abdominal scan may be uncomfortable when the bladder is full, and the transvaginal scan can cause brief pressure or discomfort. There is no known radiation-related risk. In rare circumstances, an examination can identify an unexpected finding that leads to more tests, even though many such findings ultimately prove benign.

Medical care should be sought promptly for sudden severe pelvic or abdominal pain, pain with fever or vomiting, fainting, marked dizziness, heavy vaginal bleeding, or a rapidly enlarging abdomen. A doctor should also assess persistent bloating, pelvic discomfort, early fullness, urinary changes, or unexplained weight change that lasts more than a few weeks. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals evaluate ovarian and other gynecologic conditions for international patients, including access to ovarian cancer treatment.

Frequently asked questions

Is a transvaginal ultrasound necessary to check the ovaries?

A transvaginal ultrasound often gives the clearest images of the ovaries because the transducer is close to the pelvic organs. It is not always required, and a transabdominal scan may be used alone or alongside it. The patient can discuss preferences, discomfort, and alternatives with the imaging team.

Can an ultrasound tell the difference between an ovarian cyst and cancer?

Ultrasound can identify features that make a cyst or mass appear more or less concerning, but it cannot confirm cancer on its own. Simple cysts are often benign, while complex findings may need repeat imaging, blood tests, MRI or specialist evaluation. A final diagnosis of cancer requires tissue assessment when clinically indicated.

Should a person have a full bladder for an ovarian ultrasound?

A full bladder is often requested for a transabdominal pelvic ultrasound because it can improve the view of the pelvic organs. An empty bladder is usually preferred for a transvaginal ultrasound. The appointment instructions should be followed because preparation differs between imaging centers and scan types.

Is an ovarian ultrasound painful?

Most people find the test tolerable. A full bladder can cause pressure during an abdominal scan, and a transvaginal scan can feel uncomfortable or create pressure, but it should not cause severe pain. The patient should tell the sonographer immediately if pain occurs.

What happens if an ovarian ultrasound finds a complex cyst?

A complex cyst contains features beyond simple clear fluid, such as internal material, partitions or solid-looking areas. Many complex cysts are still non-cancerous, but the finding may need repeat ultrasound, additional imaging, blood testing or referral to a gynecologist. The next step depends on the appearance, symptoms, age and menopausal status.

Can ovarian cancer be present with a normal ultrasound?

Yes. A normal ultrasound is reassuring but does not exclude every case of ovarian cancer, particularly at an early stage. Persistent or worsening symptoms should be reviewed by a clinician even if an initial scan is normal, as further evaluation may be appropriate.

References

• World Health Organization
• American College of Obstetricians and Gynecologists
• National Cancer Institute
• American Cancer Society
• Royal College of Obstetricians and Gynaecologists

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.