Ovarian Corpus Luteum Cyst: What It Is, Symptoms, and Types of Cysts

You had an ultrasound, and the report included the phrase "corpus luteum cyst." It sounds alarming, but ovarian cysts are very common and usually cause no symptoms. Let's calmly break down what this formation is, where it comes from, and in which cases it requires a doctor's attention.

What a corpus luteum cyst and a lutein cyst are

A corpus luteum cyst, or lutein cyst, is a type of ovarian cyst that forms after ovulation under the influence of the pituitary hormone LH. A "corpus luteum" forms in the ovary — a temporary gland that produces progesterone, which is needed to maintain a pregnancy if one occurs. If the corpus luteum does not form properly, fluid accumulates in it and a cyst develops. It is classified as a functional formation, meaning one related to the menstrual cycle — usually benign and short-lived.

Types of ovarian cysts: functional, hemorrhagic, pathological

Ovarian cysts are divided into functional and pathological; the corpus luteum cyst is also functional. Pathological cysts form due to abnormal cell growth and are much less common. A hemorrhagic ovarian cyst is a condition in which the growth of the cyst and stretching of its walls lead to rupture of blood vessels and bleeding into the cyst. On ultrasound, the appearance of a corpus luteum cyst can vary greatly and mimic other formations, which sometimes makes diagnosis difficult.

Why a corpus luteum cyst occurs

Causes are linked both to external factors — stress, excessive exertion, overheating, getting chilled — and to internal ones: inflammation, disruption of the hormonal system, and other conditions. Most ovarian cysts are benign, although a small proportion may be malignant, and this risk is higher after menopause.

Symptoms of a corpus luteum cyst

Often the cyst is small and causes no symptoms — it is found incidentally during an examination or ultrasound. Symptoms appear if the formation is large, ruptures, or twists, disrupting blood supply. In that case, the following are possible:

• pain in the lower abdomen — from dull and heavy to sudden and sharp, on the side of the cyst;
• pain during sex;
• bloating and a feeling of fullness after a small amount of food;
• frequent urination or difficulty emptying the bowels;
• changes in menstruation — heavy, irregular, or, conversely, scanty.

Corpus luteum cyst during pregnancy

The corpus luteum produces progesterone, which is needed to maintain pregnancy. Ovarian cysts usually do not prevent pregnancy, although they can sometimes make conception more difficult. If surgery is needed, the surgeon preserves fertility where possible — removing only the cyst while leaving the ovaries, or only one ovary.

How a cyst is diagnosed and when to see a doctor

The main method is ultrasound, usually with a vaginal probe. If a cyst is found, a repeat ultrasound after a few weeks may be needed for monitoring. If malignancy is suspected, blood tests for tumor markers are ordered, although their elevation can also occur in benign conditions — endometriosis, pelvic infection, fibroids, during menstruation. No specific treatment for a lutein cyst is required; dynamic observation is necessary. In case of complications — torsion, rupture (apoplexy), suppuration — the decision on surgery is made by the doctor. See a doctor if symptoms of a cyst appear.

A corpus luteum cyst by itself is not a reason to call an ambulance. Call 103 or 112 if sudden sharp pain in the lower abdomen occurs, as well as abdominal pain together with nausea or vomiting, or if the cyst has ruptured and bleeding has started.

This article is for reference and does not replace a doctor's consultation: only a specialist, having seen your ultrasound and history, will say whether simple observation is needed or whether something should be discussed further.

This content is for reference and does not replace a doctor's consultation. Medical disclaimer