Endometrial Hyperplasia (Uterine Thickening) Symptoms and Treatment Methods

Endometrial hyperplasia, commonly known as the thickening of the uterine lining, is a condition where the inner lining of the uterus grows unusually thick due to abnormal cell reproduction. It typically occurs when there is an excess of the hormone estrogen and a deficiency of progesterone, often manifesting as irregular bleeding. While this condition, frequently encountered during gynecological exams, does not always mean cancer, it is a health issue that absolutely requires medical monitoring to prevent future risks.

• Irregular periods, intermenstrual bleeding, or postmenopausal bleeding are the most common symptoms.
• The primary cause is an imbalance where estrogen is not adequately counteracted by progesterone.
• Obesity, polycystic ovary syndrome (PCOS), and the transition to menopause increase the risk.
• A definitive diagnosis is made using ultrasound examinations and a biopsy (tissue sample) taken from inside the uterus.
• Treatment generally involves hormone medications or hormone-releasing intrauterine devices (IUDs).

What is Endometrial Hyperplasia (Thickening of the Uterine Lining)?

Every month, the uterus thickens its inner lining (endometrium) in preparation for a potential pregnancy. If pregnancy does not occur, this thickened tissue is shed from the body during menstruation, and the cycle begins anew. Endometrial hyperplasia is a condition where this inner lining grows abnormally and fails to shed. The uncontrolled multiplication of cells alters the tissue's structure, leading to increased thickness. This condition is especially common in women over 40 and those in the perimenopausal transition.

Patients usually discover this condition during a routine gynecological ultrasound or when visiting a doctor for irregular bleeding. Although the fear of cancer is very common among patients, endometrial hyperplasia is not directly a cancer. However, certain types (particularly atypical hyperplasia) carry the potential to develop into uterine cancer over the years if left untreated. Therefore, early detection and careful monitoring based on the type of cellular changes are of great importance.

What Causes a Thickened Uterine Lining and What Are the Risk Factors?

The fundamental answer to what causes a thickened uterine lining lies in the disruption of the balance between the female hormones estrogen and progesterone. While estrogen stimulates the growth of the uterine lining, progesterone keeps this growth in check and triggers the shedding of the tissue when the time comes. If the body does not produce enough progesterone and estrogen becomes dominant, the uterine lining continues to thicken continuously.

Obesity is one of the most significant factors triggering this hormonal imbalance. Adipose (fat) tissue causes the production of extra estrogen in the body, which constantly stimulates the uterine lining. Conditions involving ovulation disorders, such as polycystic ovary syndrome (PCOS), are also major risk factors as they lead to progesterone deficiency. Furthermore, the transition to menopause (perimenopause) increases the risk of hyperplasia because menstrual cycles become irregular and ovulation does not occur every month. Never having given birth, diabetes, thyroid diseases, and the use of estrogen-only hormone replacement therapies are other factors that pave the way for abnormal thickening of the uterine lining.

Symptoms of Endometrial Hyperplasia

The most prominent and frequent sign of endometrial hyperplasia is abnormal vaginal bleeding. The nature of this bleeding varies depending on the severity of the condition and the patient's age. In women of reproductive age, menstrual cycles shorter than 21 days and menstrual bleeding that is much heavier and longer than usual (lasting more than 7 days) are the most typical symptoms. Spotting or heavy bleeding between two menstrual periods also points to an abnormality in the uterine lining.

For women in menopause, the situation is much more sensitive. Any vaginal bleeding or pinkish-brown spotting in a woman who has entered menopause and has not had a period for at least a year is considered a direct warning sign. Over time, severe bleeding can deplete the body's iron stores, leading to symptoms of anemia such as weakness, chronic fatigue, dizziness, and shortness of breath. Some patients may also experience cramp-like pains in the lower abdomen along with the bleeding. Since these types of bleeding can also resemble symptoms of uterine fibroids, it is absolutely critical that the underlying cause is determined by a specialist physician.

How is it Diagnosed at the Hospital?

The diagnostic process at the hospital usually begins with a detailed gynecological examination and a transvaginal ultrasound. During the ultrasound, the physician measures the thickness of the uterine lining in millimeters. A common question among patients here is what the normal thickness of the uterine lining should be. While a thickness of up to 15-18 millimeters can be considered normal for women of reproductive age depending on the day of their menstrual cycle, this value is expected to be under 4-5 millimeters after menopause.

If a suspicious thickness is detected during the ultrasound measurement, a tissue sample (biopsy) from inside the uterus is required for a definitive diagnosis. This procedure is usually performed in an outpatient setting using a thin plastic cannula (pipelle) inserted into the uterus; it is quick and does not require anesthesia. This small tissue sample is sent to the pathology laboratory. The pathology report definitively reveals whether there is any tendency toward cancerous changes (atypia) in the cells. When necessary, hysteroscopy—a method where the inside of the uterus is directly examined with a small camera—is also used to establish a visual diagnosis and perform a biopsy simultaneously.

Treatment for Endometrial Hyperplasia

The treatment for a thickened uterine lining is personalized based on the patient's age, desire to have children, and whether atypical (abnormal) cells are found in the pathology results. For simple hyperplasia without atypical cells, medical treatment is usually sufficient. For this purpose, pills, vaginal creams, or injections containing progesterone are prescribed to replace the deficient hormone. Hormone-releasing intrauterine devices (IUDs), which act directly inside the uterus and secrete hormones regularly, yield highly successful results in treatment.

Hormone therapy typically lasts for 3 to 6 months, after which a repeat biopsy is performed to check if the tissue has returned to normal. If atypical hyperplasia is detected in the pathology results and the patient has no plans to have children in the future, surgical removal of the uterus (hysterectomy) is recommended to completely eliminate the risk of cancer. In addition to medical treatments, breaking the excess estrogen caused by obesity by reaching an ideal weight and changing lifestyle through diet and exercise is the most critical recovery step to focus on at home.

Complications and Risk Groups

If not brought under control in a timely manner, endometrial hyperplasia can pave the way for serious health problems. The greatest risk is the deterioration of the cell structure, leading the disease to turn into uterine cancer (endometrial cancer). This risk is particularly high in cases of thickening where atypical cells are present, making close monitoring essential. Besides the cancer risk, continuous severe and irregular bleeding significantly reduces the patient's daily quality of life.

Profound anemia resulting from excessive blood loss weakens the immune system and causes chronic fatigue and heart palpitations. In women of reproductive age, the loss of the healthy structure of the uterine lining can make it difficult for an embryo to attach to the uterus, leading to infertility problems. Risk groups include obese patients with a Body Mass Index (BMI) over 30, diabetics, hypertension patients, and women with a family history of uterine, ovarian, or colon cancer.

When to See a Doctor?

Symptoms of endometrial hyperplasia often provide early warnings. You should consult an obstetrics and gynecology specialist without delay if you experience the following situations:

• If you are in menopause and notice even a single drop of vaginal bleeding or spotting.
• If your menstrual bleeding lasts longer than 7 days and is heavy enough to require changing your pad every hour.
• If you continuously experience intermenstrual bleeding or brown discharge between two periods.
• If your menstrual cycles occur at intervals shorter than 21 days.
• If heavy bleeding is accompanied by severe pelvic pain, dizziness, and faintness.

If your bleeding suddenly becomes very severe, you pass large clots, and consequently develop a feeling of faintness, extreme weakness, confusion, or shortness of breath, this may indicate an acute bleeding crisis. In such a scenario, you should immediately call the 112 emergency health line or go to the nearest hospital's emergency department without waiting.

The Process at BHT CLINIC

At the BHT CLINIC İstanbul Tema Hastanesi Gynecology and Obstetrics department, the diagnosis and treatment of endometrial hyperplasia are meticulously carried out using current medical approaches. When you visit our hospital, detailed ultrasound examinations are performed by our specialist physicians, and if deemed necessary, painless biopsy or hysteroscopy procedures can be scheduled on the same day. Thanks to our modern laboratory infrastructure, your pathology results are reported quickly and reliably.

For our patients who present with severe bleeding complaints at night or on weekends, our emergency department, which operates 24/7, and our on-call specialist team offer uninterrupted support. Bringing any previous ultrasound reports and a list of your current medications with you to your appointment will speed up the evaluation process.

Frequently Asked Questions

What should the normal thickness of the uterine lining be?

In women of reproductive age, up to 15-18 mm is considered normal depending on the menstrual cycle. However, in menopausal women, this thickness must be under 4-5 mm. Values exceeding 5 mm during menopause require a detailed examination.

Is a thickened uterine lining cancer?

No, endometrial hyperplasia is not directly cancer. However, types containing atypical cells carry the risk of turning into uterine cancer over the years if left untreated. Therefore, examining the cell structure via biopsy is essential.

Can single women experience a thickened uterine lining?

Yes, thickening of the uterine lining is related to a hormonal imbalance and can occur in single women regardless of their sexual life. It is especially common in young women with obesity or PCOS issues.

Can a thickened uterine lining be cured with herbal treatments?

No, cellular growth and hormonal imbalance in the uterine wall cannot be treated with herbal remedies. On the contrary, unconsciously used herbal products can further disrupt the hormone balance. Medical treatment is absolutely necessary.

What happens if it is left untreated?

Untreated endometrial hyperplasia can lead to severe bleeding, profound anemia, and infertility. Its most dangerous consequence is that, over time, cellular deterioration can progress and turn into uterine cancer.

To avoid leaving your health to chance and to get your regular check-ups, you can book an appointment at BHT CLINIC İstanbul Tema Hastanesi.

This article is for informational purposes only; please consult your physician for diagnosis and treatment.