Endometriosis classification
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Aravind Kuchkuntla, M.B.B.S[2]
Overview
Endometriosis is classified into four stages of severity based on revised American Society for Reproductive Medicine scoring system. The staging is based on the description and distribution of the lesions and the presence of adhesions.
Classification
Endometriosis is classified based on revised American Society for Reproductive Medicine scoring system:
- Stage I: Minimal disease, lesions are isolated and limited to the pelvis. No adhesions are present.
- Stage II: Mild endometriosis lesions are superficial with size less than 5 cm in aggregate. Lesions are scattered on the peritoneum and ovaries. No significant adhesions are present.
- Stage III: Moderate disease characterized by the presence of multiple implants, and include both superficial and deeply invasive lesions. Peritubal and periovarian adhesions may be evident.
- Stage IV: Severe disease is characterized by multiple superficial and deep implants, with large ovarian endometriomas. Filmy and dense adhesions are usually present.