When an Ovarian Cyst Is Found - Types and Deciding Between Monitoring and Surgery

Most Ovarian Cysts Are Normal

Ovarian cysts are fluid-filled sacs on or within the ovary. They are so common that most women develop them monthly as part of normal ovulation - these functional cysts form when a follicle does not release its egg or does not dissolve after ovulation. They typically resolve within 1 to 3 menstrual cycles without treatment.

Finding a cyst on ultrasound can be alarming, but understanding that the vast majority are benign and self-resolving prevents unnecessary anxiety. The key is distinguishing functional cysts from those requiring intervention.

Types of Ovarian Cysts

Functional Cysts (Most Common)

Follicular cysts and corpus luteum cysts form during the normal menstrual cycle. They are almost always benign, usually under 5cm, and resolve spontaneously. No treatment is needed - only monitoring with repeat ultrasound in 6 to 8 weeks.

Endometriomas (Chocolate Cysts)

Cysts filled with old blood, associated with endometriosis. They do not resolve spontaneously and may grow over time. Treatment depends on size, symptoms, and fertility plans. Understanding endometriosis is important for managing these cysts.

Dermoid Cysts (Teratomas)

Contain tissue like hair, teeth, or fat (formed from embryonic cells). Usually benign but do not resolve on their own. Surgical removal is typically recommended if over 5cm due to risk of ovarian torsion.

Cystadenomas

Develop from ovarian surface tissue. Can grow large (over 10cm). Usually benign but require monitoring or removal due to size-related complications.

When Surgery Is Recommended

Surgery is typically recommended when: the cyst is over 5 to 7cm and not resolving, imaging features suggest malignancy (solid components, irregular borders, blood flow within), symptoms are severe (pain, pressure), there is risk of torsion (twisting of the ovary), or the cyst is growing on serial imaging. Period pain management is related but distinct from cyst-related pain. Fertility planning considerations also influence surgical decisions.

Warning Signs Requiring Urgent Care

Seek emergency care for sudden severe pelvic pain (possible torsion or rupture), pain with fever and vomiting, dizziness or fainting with pelvic pain (possible internal bleeding from rupture), or sudden sharp pain during physical activity.

Summary

An ovarian cyst diagnosis is usually not cause for alarm. Most are functional, benign, and self-resolving. Understanding the type, size, and characteristics of your cyst - through discussion with your gynecologist - determines whether watchful waiting or intervention is appropriate. Regular follow-up ultrasounds provide reassurance and catch the rare cyst that requires treatment.