Endometriosis Staging

Endometriosis staged I–IV

Minimal Endometriosis

Stage I (Minimal)

Findings restricted to only superficial lesions and possibly a few filmy adhesions.

Mild Endometriosis

Stage II (Mild)

In addition, some deep lesions are present in the cul-de-sac.

Moderate Endometriosis

Stage III (Moderate)

As above, plus the presence of endometriomas on the ovary and more adhesions.

Severe Endometriosis

Stage IV (Severe)

As above, plus large endometriomas, extensive adhesions. Implants and adhesions may be found beyond the uterus. Large ovarian cysts are common.

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