Yes, ovarian cysts can be removed surgically, and the procedure is common and generally safe. But most ovarian cysts don’t need removal at all. The majority are functional cysts, meaning they form as a normal part of your menstrual cycle, and they resolve on their own within one to three months. The cysts that do need removal tend to be large (typically over 10 cm), growing, causing significant symptoms, or showing features that suggest they could be cancerous.
Which Cysts Go Away on Their Own
Functional cysts are by far the most common type. They develop when a follicle either doesn’t release an egg or doesn’t shrink after releasing one. These cysts are fluid-filled, thin-walled, and usually smaller than 5 to 6 cm. Your doctor will often recommend a “watch and wait” approach, rechecking with ultrasound after a cycle or two. Most disappear without any treatment.
Which Cysts Typically Need Removal
Pathological cysts are a different story. These don’t form from your normal cycle and won’t resolve on their own. The most common types include dermoid cysts (which can contain tissue like hair, skin, or teeth), endometriomas (chocolate cysts filled with old blood, caused by endometriosis), and cystadenomas (fluid-filled growths from the ovary’s outer surface). Each has specific reasons surgery is recommended.
Endometriomas larger than 4 cm are generally removed to reduce pain and improve fertility. Simply draining an endometrioma doesn’t work because the lining inside the cyst remains functional and the cyst comes back. There’s also a cancer concern: endometriosis is associated with roughly 40% of endometrioid ovarian carcinomas and 50% of clear-cell ovarian carcinomas, so leaving large endometriomas in place carries some risk of missing an early malignancy.
Dermoid cysts don’t resolve on their own and tend to grow slowly over time. They carry a small risk of causing the ovary to twist (torsion), which is a surgical emergency. For any cyst over 10 cm, or one with features that can’t clearly be classified as benign on ultrasound, surgical evaluation is recommended regardless of type.
How Doctors Decide if a Cyst Looks Dangerous
Ultrasound is the primary tool. Doctors use a set of criteria to sort cysts into benign, suspicious, or inconclusive categories. Features that suggest a cyst is benign include a simple fluid-filled sac with no internal structures, solid areas smaller than 7 mm, or a smooth multilocular cyst under 10 cm with no blood flow. Features that raise concern for cancer include an irregular solid mass, fluid accumulation in the abdomen, four or more papillary projections inside the cyst, or very strong blood flow through the growth. When the picture is unclear, your doctor may order additional imaging or blood work, or recommend surgery to get a definitive answer.
How Cyst Removal Surgery Works
The two main approaches are laparoscopy and open surgery (laparotomy). For the vast majority of benign cysts, laparoscopy is the preferred method. The surgeon makes a few small incisions in your abdomen, inserts a camera and thin instruments, and removes the cyst while preserving the ovary. This is called a cystectomy.
Open surgery, which uses a larger abdominal incision, is reserved for very large cysts, cysts with suspicious features, or situations where cancer is a real possibility. A study comparing the two approaches found that laparoscopic patients had shorter hospital stays (a median of 6 days versus 7 for open surgery) and no intraoperative complications, while the open surgery group had one case of hemorrhage during the procedure. The trade-off is that cyst rupture during the procedure is more common with laparoscopy (about 29% compared to 10% with open surgery), which matters most when cancer hasn’t been fully ruled out.
In some cases, the entire ovary is removed (oophorectomy) rather than just the cyst. This is more likely if the cyst is very large, if the ovary is badly damaged, or if there is concern about malignancy. When possible, surgeons aim to preserve the ovary, especially in younger patients who want to maintain fertility.
What Recovery Looks Like
After a laparoscopic cystectomy, many patients go home within two to three hours. You can typically return to desk work and light daily activities within one to two weeks. Most people resume their full routine, including exercise, within two to three weeks. Open surgery recovery takes longer, often several weeks before you can return to normal activity, and hospital stays are generally longer.
You can expect some bloating, mild abdominal soreness, and shoulder pain (from the gas used to inflate your abdomen during laparoscopy) in the first few days. These are normal and resolve quickly.
Impact on Fertility and Hormones
Cyst removal does affect your ovarian reserve to some degree. A prospective study of 113 women found that a key marker of egg supply dropped significantly three months after laparoscopic cystectomy. The drop was worse with certain cyst types, when both ovaries were involved, and when more cauterization (heat sealing to stop bleeding) was used during surgery.
If you’re planning to have children, this is worth discussing before surgery. Fertility specialists may recommend freezing eggs beforehand in some cases. Surgeons can also minimize damage by using sutures instead of cauterization to control bleeding, which appears to better preserve remaining egg supply. Removing just the cyst rather than the whole ovary makes a meaningful difference, since the ovary continues producing hormones and releasing eggs afterward.
Can Cysts Come Back After Surgery
Yes, recurrence is possible. A study tracking young women after surgery for dermoid cysts found a 5-year recurrence rate of about 11% after cystectomy. Interestingly, the recurrence rate was actually higher (about 20%) in patients who had the entire ovary removed, likely because the remaining ovary developed new cysts over time. Recurrence doesn’t necessarily mean another surgery is needed. Many recurrent cysts are small and can be monitored.
When a Cyst Becomes an Emergency
Ovarian torsion happens when a cyst causes the ovary to twist on its supporting ligaments, cutting off blood flow. This is a true surgical emergency. Without prompt treatment, the ovary can die, leading to permanent loss of that ovary and potential fertility consequences.
The classic symptoms are sudden, severe pelvic or lower abdominal pain, often accompanied by nausea and vomiting. The pain can be sharp or dull, constant or intermittent, and may radiate to your back or flank. Fever suggests the ovary may already be losing blood supply. One tricky aspect of torsion is that up to one-third of patients have no abdominal tenderness on physical exam, so the diagnosis can be missed. Ultrasound findings like ovarian swelling, abnormal blood flow, or a “whirlpool sign” from the twisted blood vessels help confirm it, but definitive diagnosis comes during surgery itself.
The key factor in saving the ovary is time. The shorter the gap between symptom onset and surgery, the higher the chance of ovarian salvage. If you experience sudden, intense pelvic pain with nausea, treat it as urgent.