Clinical Guidelines and Standards · Diagnostic Criteria and Classification
RRM Academy Synopsis
How Doctors Classify Endometriosis Into Four Stages
This is a 1996 update to the point system doctors use to stage endometriosis found at surgery. A seven-member committee gathered data from many physicians treating infertility patients. They found the score did not reliably predict pregnancy after treatment. They kept the tool anyway, to record where disease sits.
Key Findings
- The system uses point totals for four stages: Stage I Minimal (1 to 5), Stage II Mild (6 to 15), Stage III Moderate (16 to 40), Stage IV Severe (over 40).
- Points are based on where implants sit, how deep and large they are, and how much the cul-de-sac and ovaries are closed off by scar tissue.
- The subcommittee said the score did not reliably predict pregnancy after treatment. Changing the point cutoffs did not fix this.
- The revision added a way to record implant color: red, white, or black. Early evidence suggested color and activity may affect fertility.
- The subcommittee asks that an ovarian endometriosis cyst be confirmed by histology, or by signs such as adhesion to the pelvic wall, endometriosis on the ovary's surface, and thick, chocolate-colored fluid.
Interpretation
This is not a clinical trial. The system is a staging tool from a specialty society, revised by a subcommittee and approved by its board in January 1997. Surgeons use it to record what they see during surgery: where implants sit, how deep they are, and how much scar tissue involves the ovaries, tubes, or cul-de-sac. The pregnancy finding is reported here. The full data sit in a companion paper, absent here. The group kept the scoring system anyway, giving surgeons one shared way to record what they find, even though the score alone does not reliably predict fertility outcomes.
RRM Context
Surgeons who perform excision use tools like this one to record what they find and treat. The subcommittee's own finding, that stage does not reliably predict pregnancy, supports a core RRM idea: treat what surgery actually shows. A stage number alone is not enough. This revision also added implant color as a factor. The addition reflects the same idea. The paper says how implants look and behave may have an impact on fertility.
Abstract not indexed.
Topics
Keywords
Endometriosis/classification/complications/pathology, Female, Humans, Infertility, Female/etiology, Reproduction, Societies, Medical, United States
