Endometriosis Staging

Endometriosis staged I–IV

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Minimal Endometriosis

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Stage I (Minimal)

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

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Mild Endometriosis

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Stage II (Mild)

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

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Moderate Endometriosis

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Stage III (Moderate)

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

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Severe Endometriosis

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Stage IV (Severe)

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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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