Diagnosis & Staging: Why Hysteroscopy is the Gold Standard

Confirming a diagnosis of Asherman syndrome requires moving beyond standard imaging to a direct view of the uterine cavity. While tools like a standard ultrasound provide a “silhouette” of the uterus, they often lack the detail needed to plan effective treatment ^[1][2].

The Gold Standard: Hysteroscopy

Hysteroscopy is considered the “gold standard” for both diagnosing and staging Asherman syndrome ^[3][4]. During this procedure, a doctor inserts a hysteroscope—a thin, lighted camera—through the cervix to see the inside of the uterus directly ^[3].

• Direct Visualization: Unlike other tests, a hysteroscopy allows the doctor to see the exact location, texture, and color of the scar tissue ^[4].
• Assessment of Quality: The doctor can evaluate the health of the remaining endometrium (lining) and see if the openings to the fallopian tubes (tubal ostia) are clear ^[1][5].
• See and Treat: Often, a diagnostic hysteroscopy can transition immediately into an operative one, where the doctor begins to carefully remove the adhesions ^[2].

Diagnostic Bridge Tests

Before recommending surgery, your doctor will likely use intermediate imaging tests to investigate your symptoms:

• Saline Infusion Sonohysterography (SIS/SHG): Often called a saline sonogram, this is a first-line diagnostic test. A small amount of sterile saline is introduced into the uterus during an ultrasound to distend the walls. This creates a clear picture of any adhesions blocking the cavity and serves as a highly sensitive bridge to a hysteroscopy ^[4][1].
• HSG (X-ray with dye): This test shows the “outline” of the uterus. If the dye doesn’t fill a certain area, it suggests a blockage, but it cannot tell the difference between a thick scar, a small polyp, or a simple air bubble (a “false positive”) ^[1][2].
• 3D Ultrasound: This is a powerful screening tool that can help estimate how much of the cavity is open ^[6]. However, it often underestimates the complexity or “toughness” of the adhesions compared to what the doctor finds during surgery ^[7][2].

Staging and Severity

To help predict how well treatment will work, doctors “stage” the disease. There is no single universal system, but most doctors use the American Fertility Society (AFS) or March classification systems ^[8][7]. These systems assign points based on:

1. Extent of Disease: What percentage of the uterus is “glued” together? (e.g., less than 1/3, 1/3 to 2/3, or more than 2/3) ^[9][10].
2. Type of Adhesions: Are they filmy (thin and easy to break) or dense/fibrous (thick, tough, and opaque)? ^[9][5].
3. Menstrual Pattern: Has your period stopped entirely, or is it just lighter? ^[11].

What to Look for in Your Report

If you have a diagnostic or surgical report, look for these specific details to understand the severity of your case:

• Cavity Occlusion: Look for a percentage (e.g., “50% occlusion”) ^[9].
• Tubal Ostia: The report should state if the openings to the fallopian tubes were “visualized” or “blocked” ^[9][5].
• Endometrial Description: Descriptions like “pale” or “atrophic” lining can indicate that the foundation layer is damaged, whereas “pink” or “vascular” lining is a more positive sign ^[1][5].

While higher “grades” of scarring are generally more challenging to treat, research shows that the skill of the surgeon and the health of the remaining lining are often more important for your final outcome than the initial score ^[8][12].