N85.6 Intrauterine synechiae

Name of the Condition

• Intrauterine synechiae (ICD-10 code N85.6)

Summary

Intrauterine synechiae, also known as Asherman syndrome, refers to the formation of adhesions or scar tissue within the uterine cavity. These adhesions can partially or completely block the uterine cavity, potentially affecting menstrual function and fertility. The condition arises from damage to the endometrial lining, often due to trauma or inflammation.

Causes

The primary cause of intrauterine synechiae is trauma to the uterine lining, most commonly from surgical procedures such as dilation and curettage (D&C), especially after pregnancy. Infections, such as endometritis, or radiation therapy to the pelvis may also contribute to the development of adhesions. The extent of scarring depends on the severity and nature of the initial injury.

Risk Factors

Risk factors include a history of uterine surgery, particularly postpartum or post-abortion procedures, pelvic infections, or radiation therapy. Women with a history of repeated uterine interventions or those with certain inflammatory conditions may be at higher risk. The likelihood of adhesion formation increases with the invasiveness of the procedure and the presence of infection.

Symptoms

Symptoms may include reduced menstrual flow (hypomenorrhea), absence of menstruation (amenorrhea), pelvic pain, or infertility. Some individuals may experience recurrent pregnancy loss or difficulty conceiving. In severe cases, adhesions can lead to complete uterine cavity obstruction, resulting in amenorrhea.

Diagnosis

Diagnosis typically involves a combination of clinical evaluation and imaging. Transvaginal ultrasound or hysterosalpingography (HSG) may reveal adhesions or a narrowed uterine cavity. Hysteroscopy, a procedure using a thin scope to visualize the uterine interior, is often used to confirm the presence and extent of synechiae. Hormonal assessments may be performed to evaluate menstrual function.

Treatment Options

Treatment focuses on breaking down adhesions and preventing recurrence. Hysteroscopic adhesiolysis, a surgical procedure to remove scar tissue, is commonly performed. Post-procedure, hormonal therapy (e.g., estrogen) or intrauterine devices (IUDs) may be used to promote endometrial regrowth and reduce the risk of re-adhesion. Fertility treatments may be considered for those with infertility.

Prognosis and Follow-Up

Prognosis depends on the severity of adhesions and the success of treatment. Mild cases often have a good outcome with restored menstrual function and fertility. Severe or extensive adhesions may require multiple procedures and have a higher risk of recurrence. Follow-up typically includes monitoring for symptom recurrence and assessing uterine cavity patency via imaging or hysteroscopy.

Complications

Complications can include persistent infertility, recurrent pregnancy loss, or chronic pelvic pain. Incomplete removal of adhesions may lead to reformation, requiring additional interventions. Rarely, severe adhesions can cause uterine cavity obstruction, affecting menstrual health and pregnancy outcomes.

Lifestyle & Prevention

Preventive measures include minimizing unnecessary uterine procedures and ensuring proper post-surgical care to reduce infection risk. Prompt treatment of pelvic infections may help prevent scarring. For those undergoing uterine surgery, careful technique and postoperative monitoring can lower the likelihood of adhesion formation.

When to Seek Professional Help

Seek medical attention if you experience abnormal menstrual changes (e.g., reduced flow or absence of periods), unexplained infertility, or pelvic pain after uterine procedures. Early evaluation can help diagnose and treat synechiae before complications arise.

Tips for Medical Coders

When coding for intrauterine synechiae (N85.6), ensure documentation supports the diagnosis, including clinical findings (e.g., menstrual changes, imaging results) and any relevant history (e.g., prior uterine surgery). Note the extent of adhesions and any associated complications, as these may impact coding specificity. Verify that the code aligns with the clinical scenario and exclude other uterine disorders when appropriate.