Dermoid Cyst Ovary: Symptoms, Diagnosis, and When Treatment May Be Needed

Seeing the words “dermoid cyst ovary” on an ultrasound report can feel unsettling, especially if you are reading about it for the first time.

A dermoid cyst is different from a simple functional ovarian cyst. It is also known medically as a mature cystic teratoma and may contain various tissue types, including fat, skin, hair, and other mature tissues. The good news is that ovarian dermoid cysts are commonly benign, but they still need proper assessment because they may grow, cause pain, or increase the risk of complications such as ovarian torsion.

At Dr Law Wei Seng’s clinic, the approach is to assess the cyst carefully before deciding whether monitoring or treatment is needed. The decision usually depends on the cyst’s size,add symptoms, ultrasound appearance, growth pattern, age, and fertility plans.

What Is a Dermoid Cyst on the Ovary?

A dermoid cyst on the ovary is a type of ovarian growth that develops from germ cells, which are cells capable of forming different tissue types. This is why a dermoid cyst may contain mature tissues such as fat, skin, hair, or other elements. It is also called a mature cystic teratoma.

Although the description may sound alarming, most ovarian dermoid cysts are benign. However, benign does not always mean it should be ignored. A dermoid cyst may still need monitoring or treatment if it grows, causes symptoms, or has features that require closer evaluation.

Unlike some functional ovarian cysts that are linked to the menstrual cycle, dermoid cysts do not behave in the same way. They are usually assessed based on their size, appearance, symptoms, and possible risk of complications.

How Is a Dermoid Cyst Different from a Functional Ovarian Cyst?

Many patients ask whether a dermoid cyst is the same as a normal ovarian cyst. The answer is no.

A functional ovarian cyst is usually related to ovulation and may resolve naturally. A dermoid cyst is different because it develops from germ cells and may contain tissue elements rather than just fluid.

Type	Functional Ovarian Cyst	Dermoid Cyst Ovary
Cause	Related to the menstrual cycle or ovulation	Develops from germ cells
Content	Usually fluid-filled	May contain fat, skin-related tissue, hair, or other mature tissue
Natural course	May resolve naturally	Usually needs monitoring or removal depending on symptoms and risk
Symptoms	Often none, sometimes pain or cycle-related symptoms	Often none, but may cause pain, pressure, or torsion if larger
Treatment	Observation may be enough for simple cysts	Monitoring or surgery may be discussed depending on the case

This distinction is important because treatment decisions vary by cyst type.

Dermoid Cyst Ovary Symptoms

Many dermoid cysts are found incidentally on ultrasound and may not cause symptoms initially.

When symptoms do happen, they may include:

• Pelvic pain
• Lower abdominal discomfort
• Bloating or fullness
• A feeling of pressure in the pelvis
• Pain during sex
• Frequent urination if the cyst presses on the bladder
• Pain that becomes sudden or severe if torsion occurs

Symptoms may depend on the cyst’s size, position, and whether it affects nearby structures. Larger ovarian cysts can sometimes cause pressure symptoms, and urgent symptoms may occur if the cyst twists the ovary or ruptures. The NHS notes that ovarian cysts may cause symptoms such as pelvic pain, pain during sex, frequent urination, heavy or irregular periods, bloating, or difficulty emptying the bowels.

Can a Dermoid Cyst Become Dangerous?

Most ovarian dermoid cysts are benign, but they can still cause problems in some cases.

Possible concerns include:

• Growth over time



• Pelvic pain or pressure
• Ovarian torsion
• Rupture
• Effects on ovarian tissue if the cyst is large
• Fertility-related concerns in selected cases
• Rare concern for malignant change

One important complication is ovarian torsion, where the ovary twists around its supporting tissues. This can cause sudden abdominal or pelvic pain, nausea, or vomiting and requires urgent medical attention. 

How Is an Ovarian Dermoid Cyst Diagnosed?

A dermoid cyst is usually diagnosed through imaging, most commonly a pelvic ultrasound.

During assessment, Dr Law Wei Seng may review:

• Symptoms
• Menstrual history
• Previous ultrasound reports
• Cyst size
• Cyst appearance
• Whether one or both ovaries are affected
• Fertility plans
• Whether additional imaging or blood tests are needed

Pelvic Ultrasound

A pelvic ultrasound is commonly used to assess ovarian cysts. It helps identify the cyst’s size, location, and appearance.

A dermoid cyst may have features that suggest mixed tissue content, such as fat or other components. However, ultrasound findings should still be interpreted by a doctor together with symptoms and medical history.

Further Imaging or Blood Tests

If the ultrasound findings are unclear or if more information is needed, further imaging such as MRI or CT may be discussed. Blood tests may also be arranged in selected cases depending on the cyst appearance, age, symptoms, and risk assessment.

Not every dermoid cyst requires advanced imaging, but it may be useful when the diagnosis or treatment plan is uncertain.

Does a Dermoid Cyst Need to Be Removed?

Not every dermoid cyst needs immediate surgery, but many do require careful discussion because dermoid cysts usually do not behave like simple functional cysts.

Treatment decisions may depend on:

• Cyst size
• Symptoms
• Growth over time
• Ultrasound appearance
• Age
• Pregnancy plans
• Whether one or both ovaries are affected
• Risk of torsion
• Fertility preservation concerns
• Whether there are any concerning features

Some small dermoid cysts with no symptoms may be monitored. However, surgery may be discussed if the cyst is large, painful, growing, or at risk of complications.

The NHS explains that ovarian cyst treatment depends on factors such as size, appearance, symptoms, and whether the patient has gone through menopause. It also notes that large or persistent cysts, or cysts causing symptoms, usually need surgical removal.

Dermoid Cyst Ovary Treatment Options

Treatment should be personalised. The right option depends on the cyst and the patient’s overall situation.

Monitoring and Follow-Up Ultrasound

If the dermoid cyst is small, not causing symptoms, and does not show concerning features, Dr Law Wei Seng may recommend monitoring.

This may involve follow-up ultrasound to check whether the cyst stays stable or grows over time. Monitoring is usually individualised based on the patient’s age, symptoms, cyst size, and future pregnancy plans.

Ovarian Cystectomy

Ovarian cystectomy is surgery to remove the cyst while preserving as much normal ovarian tissue as possible.

This may be especially important for women who are pre-menopausal or who wish to preserve fertility. In suitable cases, the aim is to remove the dermoid cyst while keeping the ovary intact.

The NHS explains that if surgery is needed before menopause, the surgeon may aim to preserve as much of the reproductive system as possible, sometimes removing only the cyst and leaving the ovaries intact.

Laparoscopic Dermoid Cyst Removal

Laparoscopic surgery, also known as keyhole surgery, may be suitable for many ovarian cyst cases depending on cyst size, features, and surgical assessment.

This approach uses small cuts and specialised instruments. When suitable, keyhole surgery may involve smaller incisions and faster recovery compared with open surgery.

However, laparoscopy is not suitable for every dermoid cyst. Larger cysts, complex cases, or cases with higher concern may need a different surgical approach.

Oophorectomy in Selected Cases

Oophorectomy means removing the ovary.

This may be considered in selected cases, such as when the cyst has replaced most of the ovary, ovarian preservation is not suitable, the patient is post-menopausal, or there are more concerning features.

This does not mean every dermoid cyst requires ovary removal. Many cases can be managed with monitoring or cystectomy, depending on the assessment.

Dermoid Cyst and Fertility: What Should Patients Know?

Many women worry whether a dermoid cyst or cyst removal could affect fertility.

In suitable cases, cystectomy aims to remove the cyst while preserving ovarian tissue. This is important because the ovary plays a role in egg supply and hormone production.

Fertility-related decisions may depend on:

• Age
• Ovarian reserve
• Size of the dermoid cyst
• Whether one or both ovaries are affected
• Amount of healthy ovarian tissue remaining
• Previous ovarian surgery
• Pregnancy plans
• Whether surgery is urgent or planned

If you are planning a pregnancy or concerned about fertility, it is important to discuss this during a consultation before deciding on treatment.

When to See a Gynaecologist for a Dermoid Cyst

You should consider booking a consultation if:

• Your ultrasound report mentions a dermoid cyst or mature cystic teratoma
• You have pelvic pain or bloating
• The cyst is growing
• The cyst is large
• You are planning a pregnancy
• You want to understand whether surgery is needed
• You want a second opinion on scan findings
• You are unsure whether monitoring is enough

You should seek urgent care if you experience sudden, severe pelvic pain, pain with nausea or vomiting, dizziness, fainting, fever, or symptoms that feel much worse than usual. These may suggest complications such as torsion or rupture and should not be ignored.

What to Expect During a Dermoid Cyst Consultation

During a consultation, Dr Law Wei Seng may review your symptoms, scan findings, menstrual history, and fertility plans.

The consultation may include:

• Review of ultrasound reports
• Pelvic ultrasound if needed
• Assessment of cyst size and appearance
• Discussion of whether the cyst looks consistent with a dermoid cyst
• Review of symptoms and pain pattern
• Fertility and pregnancy planning discussion
• Treatment options such as monitoring or surgery
• Explanation of whether cystectomy or another approach may be suitable
• Follow-up plan

The goal is to help you understand the cyst clearly instead of feeling uncertain about what the ultrasound report means.

Book a Dermoid Cyst Consultation in Singapore

If your ultrasound report mentions a dermoid cyst on the ovary, a consultation can help you understand what it means and whether monitoring or treatment may be needed.

Dr Law Wei Seng can assess the cyst size, appearance, symptoms, fertility considerations, and whether follow-up ultrasound, cystectomy, or another treatment approach may be suitable.

Frequently Asked Questions

Is a dermoid cyst on the ovary cancerous?

Most ovarian dermoid cysts are benign. However, proper assessment is still important because treatment depends on cyst size, symptoms, ultrasound features, age, and risk factors.

Can a dermoid cyst in the ovary go away on its own?

A dermoid cyst is different from a simple functional cyst. Functional cysts may resolve on their own, but dermoid cysts usually require monitoring or removal, depending on symptoms, size, and risk assessment.

What happens if a dermoid cyst is left untreated?

It may remain stable, grow slowly, or cause symptoms such as pelvic pain or pressure. In some cases, it may increase the risk of ovarian torsion or rupture. This is why follow-up is important if monitoring is recommended.

How is a dermoid cyst removed?

A dermoid cyst may be removed through ovarian cystectomy, where the cyst is removed while preserving ovarian tissue, where possible. Laparoscopic surgery may be suitable in selected cases.

Can a dermoid cyst affect fertility?

It can affect fertility planning depending on size, location, whether both ovaries are involved, and whether surgery is needed. If fertility is important to you, discuss this with Dr Law Wei Seng before deciding on treatment.

Is dermoid cyst surgery urgent?

Not always. Many dermoid cysts can be carefully assessed and planned. However, sudden severe pelvic pain, nausea, vomiting, fever, dizziness, or fainting should be assessed urgently.