Functional, Dermoid or Endometrioma: How the Type of Ovarian Cyst Guides Treatment

The sonographer goes quiet for a second longer than feels comfortable, then says something like, “There’s a small cyst on the left ovary; your doctor will explain.” For the rest of the appointment, that one word sits in the room. Cyst. It sounds like a diagnosis. In truth, it is closer to a category heading, and the story underneath it depends entirely on which of the types of ovarian cysts you are looking at.

A fluid-filled pocket left behind by ovulation is a different animal from a slow-growing dermoid, which is different again from an endometrioma stuck to the pelvic wall. One is likely to be gone by the next scan. One is likely to need removing at some point. One is really a sign of a wider condition that deserves its own conversation.

This explainer walks through those differences the way a good gynecologist would across the desk: what each type is, how it behaves, what the scan and blood tests can and cannot tell, and why “wait and rescan” is sometimes the most evidence-based advice you can receive.

What are the types of ovarian cysts, and why does the type change the plan?

An ovarian cyst is a sac, usually filled with fluid, that develops on or inside an ovary. That definition covers an enormous range of things, which is why clinicians sort cysts into types before they talk about treatment. The Cleveland Clinic notes that most people who have ovaries will develop at least one cyst during their lifetime, and the overwhelming majority never know it because the cyst comes and goes without symptoms.

The first and largest division is between functional cysts and everything else. Functional cysts are a by-product of the menstrual cycle itself. Follicular cysts and corpus luteum cysts belong here, and both tend to shrink and vanish within weeks to a few months, according to Mayo Clinic. Nothing needs to be done except confirming that they have gone.

The second group, often called pathological or non-functional cysts, does not come from ovulation and does not follow the cycle’s rhythm. Dermoid cysts (also called mature teratomas) grow from cells capable of forming skin, hair and teeth. Cystadenomas grow from the surface tissue of the ovary and can become large. Endometriomas form when endometriosis, the condition in which womb-lining tissue grows outside the womb, sets up inside the ovary.

Why does the label matter so much? Because the natural history differs. A functional cyst will usually resolve; a dermoid will not, and it may slowly enlarge; an endometrioma signals a chronic condition that affects far more than one ovary. Age matters too. After menopause the ovaries stop releasing eggs, so functional cysts essentially stop forming, and any new cyst earns closer attention. The type, the size, the ultrasound appearance and the person’s stage of life together shape whether the plan is a repeat scan, a discussion about hormones or a conversation about surgery.

How ovarian cysts actually form during a menstrual cycle

Picture the ovary as a small orchard that ripens one fruit a month. Each cycle, several follicles, the tiny sacs that each house an immature egg, begin to grow under the influence of hormones from the pituitary gland. Usually one follicle takes the lead, swells with fluid to roughly the size of a grape, and around mid-cycle bursts to release its egg. That rupture is ovulation.

Two things can go slightly off script, and both produce a functional cyst. The first is that the dominant follicle keeps filling with fluid but never bursts. The egg stays inside, the sac keeps growing, and you have a follicular cyst. Mayo Clinic describes this as the most common type, and most disappear within two to three months as the fluid is reabsorbed.

The second detour happens after ovulation. Once the egg is released, the empty follicle reorganizes into the corpus luteum, a temporary hormone factory that pumps out progesterone to prepare the womb lining. Normally it shrinks away if no pregnancy follows. Sometimes the opening seals over and fluid or blood collects inside, producing a corpus luteum cyst. These can bleed and occasionally cause a sharp twinge, but they too usually resolve on their own.

Non-functional cysts follow different rules entirely. A dermoid starts from a germ cell, the kind of cell that can become any tissue, which explains its strange contents. A cystadenoma arises from the ovary’s outer lining and fills with watery or mucus-like fluid. An endometrioma forms when misplaced womb-lining tissue inside the ovary bleeds month after month with no exit, gradually pooling old blood. None of these are triggered by a single cycle’s mishap, so none can be expected to disappear when the next period arrives. That biological difference is the foundation of every treatment decision that follows.

Functional cysts: the follicle that didn't finish its job

If your scan report says “simple cyst” and you are still having periods, the odds heavily favor a functional cyst. On ultrasound it looks like a smooth, thin-walled bubble with clear fluid inside, no solid areas and no internal partitions. Radiologists use the word “simple” deliberately; it signals features that are almost always benign.

The Cleveland Clinic puts most functional cysts in the range of 2 to 5 centimeters, roughly a cherry to a small plum, and reports that they typically resolve within about 60 days without any treatment. The NHS similarly advises that most cysts in people who have not reached menopause disappear within a few months and that a follow-up scan, often after several weeks, is the usual way to confirm this.

Symptoms, when they occur, are usually mild: a dull ache on one side, a feeling of pelvic fullness, discomfort during sex or a period that arrives a little differently. Many functional cysts produce nothing at all and are found by accident during a scan for another reason. A corpus luteum cyst can bleed inside itself and cause a sharper pain, though this generally settles as the cyst shrinks.

Treatment, in the strict sense, is rarely needed. Watchful waiting with a repeat ultrasound is the guideline-level approach. Some clinicians discuss combined hormonal contraceptives, medicines that suppress ovulation, because a body that is not ovulating cannot form new functional cysts. Mayo Clinic is clear that these medicines do not shrink a cyst that already exists; they only reduce the chance of new ones. Whether that trade-off makes sense is a decision for the person and their prescribing clinician, weighing recurrence history against the medicine’s own risks and benefits.

Surgery for a functional cyst is uncommon and generally reserved for cysts that grow, persist beyond several cycles, cause significant pain or develop worrying features.

Dermoid cysts: why a teratoma can contain hair and teeth

Dermoid cysts unsettle people more than any other type, usually because of what they contain. Hair, sebaceous (oily) material, skin and even fragments of tooth or bone can all turn up inside one. The explanation is less alarming than the imagery. A dermoid, formally a mature cystic teratoma, grows from a germ cell, one of the primitive cells present in the ovary from before birth that has the capacity to develop into any tissue type. Left to its own devices, it produces a jumble of ordinary tissues in an extraordinary place.

Mayo Clinic describes dermoids as one of the cyst types that can grow large and notes that they are rarely cancerous. The Cleveland Clinic adds that they most often affect people in their reproductive years and that a small proportion involve both ovaries. Growth is slow, typically over years rather than months, and many are found incidentally.

Two features drive treatment decisions. First, a dermoid will not resolve; waiting will not make it disappear. Second, its heavy, uneven contents make it more prone than a simple fluid cyst to ovarian torsion, in which the ovary twists on its supporting ligament and cuts off its own blood supply. Torsion is a surgical emergency, and Mayo Clinic lists sudden, severe pelvic pain with nausea and vomiting as its hallmark.

For those reasons, surgical removal is commonly recommended once a dermoid reaches a size that concerns the surgeon or begins to cause symptoms, though small, quiet dermoids may be monitored for a time. The operation is usually a cystectomy, meaning the cyst is peeled from the ovary while the ovary itself is preserved, and is most often done laparoscopically through small keyhole incisions. Surgeons take care to avoid spilling the contents, which can irritate the abdominal lining. The exact timing, approach and whether the whole ovary needs to come out are individual judgments that belong with the treating team.

Endometriomas: the 'chocolate cyst' that comes with endometriosis

An endometrioma is the one cyst on this list that is really a symptom of something larger. Endometriosis is a condition in which tissue similar to the womb lining grows outside the womb, most often on the ovaries, fallopian tubes and pelvic lining. The World Health Organization estimates that it affects roughly 10 percent of women and girls of reproductive age worldwide, around 190 million people.

When that misplaced tissue takes hold inside an ovary, it responds to the same monthly hormonal signals as the womb lining does. It thickens and bleeds, but the blood has nowhere to go. Over successive cycles it accumulates, darkens and thickens into a tar-like fluid, which is why these cysts earned the informal name “chocolate cysts.” On ultrasound they have a characteristic ground-glass appearance that an experienced sonographer often recognizes.

Endometriomas behave differently from functional cysts in every way that matters. They do not resolve between cycles. They are frequently accompanied by other signs of endometriosis: painful periods, deep pain during sex, pain with bowel movements and, for some, difficulty conceiving. They may also be surrounded by scar tissue that tethers the ovary to nearby structures.

Treatment therefore sits within a wider endometriosis plan rather than a cyst-only plan. Hormonal medicines that quiet the menstrual cycle can reduce pain and slow the disease, though they do not remove an existing cyst. Surgery, usually laparoscopic, can remove the endometrioma and treat visible endometriosis elsewhere in the pelvis. Surgeons weigh this carefully because operating on an ovary can reduce its reserve of eggs, a consideration that matters enormously to anyone hoping for a future pregnancy. There is no single right answer; the balance between pain relief, fertility goals, cyst size and the risk of recurrence is worked out person by person with a gynecologist, and often with a fertility specialist alongside.

Does one cyst mean PCOS? Why a single cyst is not a syndrome

The name does a lot of damage here. Polycystic ovary syndrome sounds as though it should be diagnosed by counting cysts, so a scan report mentioning one cyst often sends people searching whether they have PCOS. The short answer is no: a single ovarian cyst does not mean PCOS, and PCOS is not really a cyst condition at all.

PCOS is a hormonal and metabolic syndrome. Its features, as described by MedlinePlus and Mayo Clinic, include irregular or absent periods, higher-than-typical levels of androgens (hormones such as testosterone) that can cause acne or excess facial and body hair, and ovaries that on ultrasound show many small follicles arranged around the edge like a string of pearls. Those “cysts” are immature follicles a few millimeters across that never progressed to ovulation. They are not the fluid-filled sacs of several centimeters that this article has been discussing, and they are not removed surgically.

Diagnosis rests on a combination of clinical findings, not on the ultrasound alone. Many people with classic polycystic-appearing ovaries have entirely regular cycles and no syndrome; others meet criteria for PCOS with ovaries that look ordinary on a scan. A gynecologist or endocrinologist makes the call by weighing menstrual history, signs of androgen excess, blood tests and the exclusion of other causes.

Where the two topics genuinely overlap is in functional cysts. Because ovulation in PCOS can be irregular, follicles sometimes stall and enlarge, producing a true follicular cyst. That cyst is managed exactly as any other functional cyst would be. The reverse is not true: a functional cyst in someone with regular cycles and no other features is simply a functional cyst. If the word PCOS is worrying you, the useful question for your doctor is not “how many cysts do I have” but “do my cycles and hormones suggest a syndrome?”

Can ovarian cysts be cancerous? Which types raise concern

This is the question underneath every other question, so it deserves a direct answer. The large majority of ovarian cysts are benign. The NHS states that most cysts are harmless and that cancerous cysts are more common after menopause. Mayo Clinic makes the same point: the risk that a cyst is cancerous rises with age, and postmenopausal status is one of the main reasons a doctor will look harder and follow up sooner.

No cyst type is “the cancerous one” in a simple sense. Functional cysts, by definition, are benign. Dermoids are rarely malignant. Endometriomas are benign, though long-standing endometriosis carries a small increased risk of certain ovarian cancers. Cystadenomas are benign by definition, but the same cell lineage can produce borderline or malignant tumors, which is why size and appearance matter more for this group.

Rather than the label, clinicians read the features. Ultrasound findings that increase concern include solid areas within the cyst, thick internal walls or partitions, irregular growths on the inner surface, abnormal blood flow on Doppler imaging, fluid in the abdomen (ascites) and rapid growth between scans. A simple, thin-walled, fluid-only cyst in someone still having periods is at the reassuring end of the spectrum.

Blood tests add context but not certainty. CA-125 is a protein that is often raised in ovarian cancer, yet Mayo Clinic notes it is also elevated in endometriosis, fibroids and pelvic inflammatory disease, and it can be normal in early cancer. For that reason it is usually interpreted alongside ultrasound and age rather than on its own, and it is used more in postmenopausal assessment than in younger people.

When features are concerning, the pathway shifts: referral to a gynecologic oncologist, further imaging such as MRI, and often surgery that removes the cyst intact so a pathologist can examine it. That step, not the scan, is what finally answers the question.

Is there a '3:2:1 rule' for ovarian cysts? What guidelines actually use

Search engines are full of people asking about a “3:2:1 rule” for ovarian cysts, and honesty requires saying plainly: none of the major guideline bodies, including the NHS, publish anything by that name. The phrase appears to be an informal or misremembered shorthand, possibly for size thresholds in centimeters, possibly for the number of follow-up scans, possibly a garbling of ultrasound scoring systems that radiologists use. If a clinician has quoted a rule to you, ask them exactly what it refers to.

What guidelines actually use is more structured and less catchy. The first element is menopausal status, because the same-looking cyst carries different odds before and after menopause. The second is size, measured on ultrasound and tracked over time; a cyst that grows between scans behaves differently from one that shrinks or stays put. The third is morphology, the shape and internal architecture: simple versus complex, fluid-only versus solid components, smooth versus irregular walls.

Radiology and gynecology societies have formalized this into scoring systems that classify ovarian masses from almost certainly benign to highly suspicious based on a checklist of ultrasound features. These systems, rather than any three-number mnemonic, are what drive decisions about whether to rescan in a few months, request an MRI or refer to a specialist surgeon. Blood markers such as CA-125 are added mainly in postmenopausal assessment.

The practical lesson is that a single number rarely settles anything. A 4-centimeter simple cyst in a 28-year-old and a 4-centimeter complex cyst in a 65-year-old share a diameter and nothing else. If you want a framework to hold onto, the evidence-based version is: how old am I in reproductive terms, how big is it and is it changing, and what does it look like inside? Those three questions, in that order, mirror how your care team is thinking.

Ovarian cyst types and treatment at a glance, and how doctors tell them apart

The table below condenses the distinctions this article has drawn. It is a map, not a verdict; only your treating team can place your particular cyst on it.

Type	Origin	Resolves on its own?	Typical approach
Follicular cyst	Follicle that did not release its egg	Usually, within about 2–3 cycles	Watch and rescan
Corpus luteum cyst	Post-ovulation sac seals and fills	Usually	Watch and rescan; pain relief if needed
Dermoid (teratoma)	Germ cell producing skin, hair, teeth	No	Often surgical removal if growing or symptomatic; torsion risk
Endometrioma	Endometriosis tissue inside ovary	No	Managed within endometriosis plan; hormones and/or surgery
Cystadenoma	Ovary surface lining	No	Monitored if small; removed if large or complex

Telling these apart starts with a transvaginal ultrasound, in which a slim probe placed in the vagina gives a close view of the ovaries. Sonographers assess size, wall thickness, internal echoes and blood flow. A clear bubble suggests functional; ground-glass fluid suggests endometrioma; bright, mixed contents with shadowing suggest dermoid; large, thin-walled, sometimes multi-chambered fluid suggests cystadenoma.

Where ultrasound is ambiguous, MRI can characterize tissue more precisely, distinguishing fat (typical of dermoid) from old blood (typical of endometrioma). Blood tests include a pregnancy test, because an ectopic pregnancy can mimic a cyst, and in some cases tumor markers. Finally, time itself is a diagnostic tool: Mayo Clinic notes that a repeat scan after several weeks separates functional cysts, which shrink, from everything else, which does not.

Who is usually offered surgery, and who is asked to wait

Waiting is not the same as doing nothing, and for most cysts it is the evidence-based choice. Someone still having periods, with a simple fluid-filled cyst and mild or no symptoms, is typically asked to return for a repeat ultrasound after a few menstrual cycles. The NHS describes this watchful approach as standard, because the great majority of such cysts will have gone by the follow-up scan. Surgery in that situation would expose a person to anesthetic and operative risk for a problem that was about to solve itself.

The picture shifts when one or more of the following applies: the cyst is large, it persists or grows across successive scans, it causes ongoing pain or pressure symptoms, ultrasound shows complex or solid features, or the person is past menopause. Dermoids and cystadenomas often fall into the surgical category simply because they will not disappear and can grow. Endometriomas may be removed when pain is not controlled by other means, when fertility treatment is planned, or when size and features make surgeons uneasy.

Two operations are commonly discussed. Ovarian cystectomy removes the cyst while preserving the ovary and is usually preferred in people who may want children. Oophorectomy removes the whole ovary and is more often considered after menopause, when a cyst is very large, or when cancer is suspected and intact removal is a priority. Most procedures are laparoscopic, through small incisions; a larger open incision may be chosen for very big masses or when malignancy is a concern.

Emergency surgery is a separate track. Suspected torsion or a ruptured cyst with significant internal bleeding does not wait for a repeat scan. Between those poles, the decision is a weighing of risks, symptoms, fertility goals and imaging findings that no article can make for you. Ask your gynecologist to talk you through where you sit and why.

What the following weeks usually look like

The timeline depends on the path chosen. For watchful waiting, the following weeks are mostly ordinary life with one appointment on the calendar. Mayo Clinic and the NHS both describe a repeat ultrasound after several weeks to a few months as the typical check. Many people notice that a mild ache eases before that scan, which is consistent with a functional cyst reabsorbing. Keeping a brief note of pain, its timing in your cycle and anything unusual gives your doctor useful information at follow-up.

After laparoscopic cyst removal, people commonly go home the same day or after one night. Expect shoulder-tip discomfort for a day or two from the gas used to inflate the abdomen, tenderness around the small incisions and tiredness. Most return to light activity within a week or so and to fuller activity over a few weeks, though this varies with the individual and the extent of surgery; your surgical team will give the timeline that applies to you rather than a general one. Open surgery involves a longer hospital stay and a longer recovery.

Bleeding or spotting for a short period afterward is common. Bowel habits may take a few days to settle. Gentle walking is encouraged early because it reduces the risk of blood clots and helps the gas disperse.

Pathology results, the microscope examination of the removed tissue, usually arrive within a couple of weeks and confirm the cyst type definitively. For endometriomas, the post-operative conversation often turns to longer-term management of endometriosis, since surgery treats the cyst but not the underlying tendency.

Menstrual cycles may be a little irregular for a cycle or two after ovarian surgery as the ovary recovers. Persistent heavy bleeding, worsening pain, fever, redness around incisions or vomiting are not part of a normal recovery and warrant a call.

What people often get wrong about ovarian cysts

The first misconception is that a cyst is always a problem to be removed. Functional cysts are a normal variation of ovulation; the Cleveland Clinic points out that most people with ovaries will have one at some stage, usually without knowing. Treating them as disease leads to unnecessary anxiety and, occasionally, unnecessary operations.

The second is that “cyst” and “tumor” are code words for cancer. Both are broad anatomical terms. A tumor is any abnormal growth; a cyst is a fluid-filled sac. Neither word carries a verdict about malignancy, and most ovarian cysts are benign, as the NHS and Mayo Clinic both emphasize.

Third, many believe hormonal birth control will shrink an existing cyst. Mayo Clinic is explicit that it does not; it can only reduce the formation of new functional cysts by suppressing ovulation. If a clinician suggests it, that is the purpose being served.

Fourth is the PCOS confusion covered earlier: one cyst does not make a syndrome, and PCOS is defined by hormones and cycles, not by a cyst count.

Fifth, people often assume a cyst will affect fertility. Functional cysts and dermoids generally do not; they are removed with the ovary preserved when surgery is needed. Endometriomas and the endometriosis behind them can affect fertility, which is why that type is discussed differently.

Sixth, size is treated as destiny. A large simple cyst in a young person can still be benign and may still resolve; a small complex cyst after menopause can be the one that needs urgent attention. Features and life stage weigh as much as centimeters.

Finally, there is a persistent belief that diet, supplements or detox routines dissolve cysts. No reputable evidence supports this. Functional cysts resolve because the body reabsorbs them, and non-functional cysts do not resolve at all, whatever one eats.

Questions to ask your care team

A ten-minute appointment goes further when you arrive with the right questions. The ones below are the ones gynecologists most often wish patients had asked, and they map onto the decisions this article has described.

• Which type of ovarian cyst do you think this is, and how confident are you from the ultrasound alone?
• Is it simple or complex, and what specific features led you to that description?
• How large is it now, and is that a size you would expect to resolve on its own?
• Do you recommend a repeat scan, and if so, when and why that interval?
• Are any blood tests useful in my situation, and how would you interpret them alongside the scan?
• What symptoms should prompt me to come back sooner than the planned follow-up?
• If surgery is discussed: would you aim to remove the cyst alone or the whole ovary, and how would that affect my hormones or fertility?
• Is there a risk this could twist or rupture, and how would I recognize that?
• If this is an endometrioma, who will coordinate my wider endometriosis care?
• If I am past menopause, does that change how closely you want to watch this?

Bring a written note of your menstrual history, any previous cysts and any family history of ovarian or breast cancer, because these shape the assessment. It is also reasonable to ask for a copy of the scan report so you can see the measurements and descriptions yourself. If the answers leave you uncertain, asking for a referral to a gynecologist, or for a second opinion, is a normal part of good care rather than a challenge to it. The plan should make sense to you, and a good team will explain it until it does.

When to call your doctor: ovarian cyst red flags

Most ovarian cysts never produce an emergency, but two complications can, and both announce themselves clearly. Ovarian torsion occurs when a cyst makes the ovary heavy enough to twist on its supporting ligament, cutting off its blood supply. Rupture occurs when a cyst bursts, sometimes with bleeding into the abdomen. Mayo Clinic and the NHS list the warning signs, and they overlap.

Seek emergency care immediately, by calling emergency services or going to the nearest emergency department, if you experience sudden, severe pelvic or lower abdominal pain, especially on one side; pain accompanied by nausea or vomiting; pain with fever; dizziness, faintness or weakness, which can indicate internal bleeding; rapid breathing or a racing heartbeat; or a rigid, very tender abdomen. Heavy vaginal bleeding alongside severe pain also warrants urgent assessment.

Contact your doctor promptly, within a day or two, for symptoms that are less dramatic but new or worsening: a persistent ache or pressure in the pelvis, bloating or a visibly swollen abdomen that does not settle, feeling full quickly when eating, needing to urinate more often or having difficulty emptying, pain during sex, or a change in your periods that lasts more than a cycle or two. After menopause, any new pelvic pain, bloating or vaginal bleeding should be reported without waiting for a routine appointment.

If you are already being monitored for a known cyst, do not wait for the scheduled scan if your symptoms change. Recovery from surgery has its own red flags: worsening rather than easing pain, fever, redness or discharge at incision sites, persistent vomiting or calf pain and swelling.

None of these signs confirms a complication on their own, and many have other, less serious explanations. The point of listing them is not to alarm but to make sure the decision about whether something needs a look is made by a clinician, not by waiting it out at home.

Frequently asked questions

What type of ovarian cysts are cancerous?

No single type is inherently cancerous, and most cysts of every type are benign. Functional cysts are always benign, dermoids are rarely malignant, and endometriomas are benign. Cystadenomas share a cell origin with some ovarian cancers, so their size and features are watched more closely. Doctors judge risk from ultrasound appearance, growth over time and menopausal status rather than from the label.

What is the 3:2:1 rule for ovarian cysts?

No major guideline publishes a “3:2:1 rule” for ovarian cysts; the phrase seems to be an informal shorthand or a misremembered version of ultrasound scoring systems. Clinicians actually use three questions: menopausal status, size and change over time, and internal appearance on ultrasound. If someone quoted a rule to you, ask them exactly what the numbers referred to.

What are red flags for ovarian cysts?

Sudden, severe pelvic pain, especially with nausea, vomiting, fever, dizziness or faintness, is a red flag for ovarian torsion or rupture and needs emergency care. Persistent bloating, feeling full quickly, urinary changes, pain during sex or new pelvic pain or bleeding after menopause should be reported to your doctor promptly rather than waiting for a routine scan.

Does one cyst on the ovary mean PCOS?

No. A single ovarian cyst does not indicate polycystic ovary syndrome. PCOS is a hormonal condition diagnosed from irregular periods, signs of excess androgens and ovaries showing many tiny immature follicles, not one larger fluid-filled sac. Someone with regular cycles and a lone functional cyst simply has a functional cyst, which is managed on its own terms.

Can ovarian cysts be cancerous after menopause?

The chance that a new ovarian cyst is cancerous rises after menopause, which is why doctors follow postmenopausal cysts more closely, according to the NHS and Mayo Clinic. Most are still benign. Assessment usually combines ultrasound features, sometimes a CA-125 blood test and possibly MRI, and referral to a specialist if features are concerning.

How do functional ovarian cysts differ from other types in treatment?

Functional cysts arise from the menstrual cycle and usually disappear within weeks to a few months, so treatment is normally a repeat ultrasound to confirm resolution. Dermoids, cystadenomas and endometriomas do not resolve on their own; they are monitored if small and quiet, and surgically removed if they grow, cause symptoms or show complex features.

Does birth control shrink an ovarian cyst?

Hormonal contraceptives do not shrink an existing ovarian cyst, as Mayo Clinic notes. By suppressing ovulation they can reduce the chance of new functional cysts forming, which is why some clinicians discuss them for people with repeated cysts. Whether that is appropriate depends on your history and other health factors, and is a decision for you and your prescribing clinician.

What is a chocolate cyst on the ovary?

A chocolate cyst is the informal name for an endometrioma, a cyst formed when endometriosis tissue inside the ovary bleeds each cycle and old blood accumulates into a dark, thick fluid. It does not resolve on its own and often comes with painful periods or pain during sex. It is managed as part of endometriosis care, sometimes with hormones, sometimes with surgery.

Will an ovarian cyst affect my fertility?

Functional cysts and dermoids generally do not affect fertility, and when surgery is needed the ovary is usually preserved. Endometriomas can affect fertility because of the underlying endometriosis and because surgery on the ovary may reduce its egg reserve. Anyone hoping to conceive should raise this early so the gynecologist can weigh it in the plan.

How long does it take for an ovarian cyst to go away?

Functional cysts typically resolve within about two to three menstrual cycles, and the Cleveland Clinic cites around 60 days as usual; a follow-up scan confirms this. Non-functional cysts such as dermoids, cystadenomas and endometriomas do not go away by themselves. If a cyst persists or grows across scans, your doctor will discuss the next step.

References

• NHS — Ovarian cyst
• Cleveland Clinic — Ovarian Cysts
• MedlinePlus — Ovarian Cysts
• World Health Organization — Endometriosis fact sheet

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.