Ovarian Cysts and Ovarian Cancer: Is There a Link?

Many women have heard of ovarian cysts and ovarian cancer, often in conversations about reproductive health or after experiencing symptoms such as bloating, pelvic discomfort or changes in the menstrual cycle. Because both conditions involve the ovaries and can sometimes present with similar symptoms, it is understandable that they are often confused with one another. However, despite the similarities, ovarian cysts and ovarian cancer are very different in how they develop, how they behave and the level of medical concern they may raise.

Understanding these differences can help you feel more informed and less uncertain, especially if you have recently been told you have an ovarian cyst or are experiencing symptoms that seem unusual.

What Are Ovarian Cysts?

Ovarian cysts are fluid-filled sacs that form within or on the surface of an ovary. They are relatively common, particularly during the reproductive years, and many develop as a normal part of the menstrual cycle.

In most cases, ovarian cysts are benign and may resolve naturally without treatment. However, not all cysts develop in the same way. Different types can arise depending on their cause and underlying characteristics.

Functional Cysts

Functional cysts are the most common type and are linked to the menstrual cycle. Many disappear on their own within a few menstrual cycles.

• Follicular Cysts – These occur when the follicle, which normally releases an egg during ovulation, does not rupture as expected. Instead, fluid continues accumulating and forms a cyst.
• Corpus Luteum Cysts – After an egg is released, the follicle typically shrinks and breaks down. Sometimes the opening seals and fluid collects within the structure, resulting in a cyst.

Non-Functional Cysts

Also known as pathological cysts, these are not related to the normal menstrual process and develop because of abnormal cell growth.

• Dermoid Cysts – These may contain tissues such as hair, skin or teeth because they arise from embryonic cells capable of developing into different tissue types.
• Cystadenomas – These grow from the outer surface of the ovary and may contain watery or mucus-like fluid.
• Endometriomas – Often referred to as chocolate cysts, these develop when endometriosis tissue grows within or on the ovaries.

How Are Ovarian Cysts Assessed and Monitored?

When an ovarian cyst is identified, your doctor will usually begin by assessing its appearance, size and characteristics. A pelvic ultrasound is commonly used to determine whether the cyst appears fluid-filled, solid or complex.

If the findings suggest a simple benign cyst and you are not experiencing significant discomfort, a period of monitoring may be recommended. This often involves repeat imaging after some time to observe whether the cyst changes in size or resolves naturally.

For more complex findings, additional investigations may be considered. Blood tests such as the CA-125 test may sometimes be used as part of a broader assessment, particularly in postmenopausal women or when imaging raises concerns.

What Is Ovarian Cancer?

Ovarian cancer develops when abnormal cells within the ovary begin multiplying uncontrollably, leading to the formation of a malignant growth. Unlike benign ovarian cysts, cancerous cells can invade surrounding tissues and spread beyond the ovaries.

Although ovarian cancer is less common than ovarian cysts, early detection remains important because the condition can be difficult to identify in its initial stages. Early signs are often subtle and may resemble digestive problems or common menstrual discomfort.

Warning Signs That Should Not Be Ignored

The early features of ovarian cancer can be non-specific and are sometimes mistaken for everyday digestive or hormonal changes. However, symptoms that persist or occur frequently over several weeks deserve attention.

You may want to seek medical assessment if you notice:

• Persistent abdominal bloating or swelling
• Feeling full after eating small amounts
• Increased urinary urgency or frequency
• Pelvic or abdominal discomfort
• Changes in bowel habits such as constipation or diarrhoea
• Unexplained weight loss
• Ongoing fatigue

Having these symptoms does not necessarily mean ovarian cancer is present, but persistent changes should not be ignored.

Understanding the Difference Between Ovarian Cysts and Cancer

One of the main differences between ovarian cysts and ovarian cancer lies in the nature of their growth. Ovarian cysts are often benign fluid-filled structures that may be temporary and resolve naturally. Ovarian cancer involves abnormal cells that continue growing and can spread to other parts of the body.

Age can also provide important clues. Benign ovarian cysts are more commonly seen during the reproductive years, while the risk of ovarian cancer tends to increase after menopause.

Another distinction is the pattern of symptoms. Smaller uncomplicated cysts often cause little to no discomfort. Ovarian cancer symptoms may initially be subtle but are more likely to become persistent and progressively noticeable over time.

Taking the Next Step Towards Greater Reassurance

Not every ovarian cyst is a cause for concern and experiencing symptoms does not automatically mean cancer is present. However, becoming familiar with what feels normal for your body can make it easier to recognise when something seems different.

At GynaeMD, an ovarian cyst clinic in Singapore, patients receive personalised evaluation and treatment recommendations from Dr Christopher Ng according to their symptoms, medical history and healthcare needs. If you are experiencing ongoing pelvic discomfort or have concerns about changes affecting your reproductive health, schedule a consultation for greater clarity and understanding of the next steps suited for your needs.

Meet Our Gynaecologist in Singapore

Dr Christopher Ng is a senior obstetrician and gynaecologist with extensive experience in both routine and complex women’s health conditions. He received training in Obstetrics, Gynaecology and General Surgery at Singapore General Hospital, Tan Tock Seng Hospital and KK Women’s & Children’s Hospital. In addition, he has also completed a clinical attachment at the Mayo Clinic in Rochester, USA under Dr John Donohue.