Background: Polypoid endometriosis (PEM) is a rare and unique type of endometriosis. To date, no article has provided a systematic report of this disease. The current article provides a complete report on rare PEM based on ultrasound, magnetic resonance imaging, intraoperative findings and postoperative pathology data.
Case summary: A 38-year-old female patient was admitted to our hospital after complaining of "vague pain in the right lower quadrant with an aggravated menstrual period for 8 mo". The patient underwent laparoscopic exploratory surgery on January 7, 2022. The postoperative pathology revealed extensive PEM.
Conclusion: PEM is a type of endometriosis that is a benign disease but has biological properties similar to malignant tumours.
Keywords: Case report; Magnetic resonance imaging; Polypoid endometriosis; Ultrasonography.
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