biostudies-literatureUnknown22(1)Han L<h4>Background</h4>Malignant transformation of endometriosis is infrequent at the laparoscopic trocar site. Although malignant transformation is uncommon, it must be acknowledged in order to achieve radical resection.<h4>Case presentation</h4>We report on a 54-year-old woman with trocar site endometriosis 2 years after laparoscopic ovarian endometrial resection. Physical examination revealed a subcutaneous solid tumor with a diameter of 3 cm surrounding the scar of laparoscopic surgery in the right lower abdomen. Transabdominal ultrasonography showed a cystic tumor in the subcutaneous adipose layer of the right lower abdomen. The pathological diagnosis was poorly differentiated endometrioid carcinoma. Hysterectomy, bilateral salpingo-oophorectomy and pelvic lymphadenectomy were then perforBMC women's health163https://www.ebi.ac.uk/biostudies/studies/S-EPMC9103296biostudies-literatureMalignant transformation of endometriosis in a laparoscopic trocar site a case report.PMC9103296Han LZhang BfalseMalignant transformation of endometriosis in a laparoscopic trocar site a case report.<h4>Background</h4>Malignant transformation of endometriosis is infrequent at the laparoscopic trocar site. Although malignant transformation is uncommon, it must be acknowledged in order to achieve radical resection.<h4>Case presentation</h4>We report on a 54-year-old woman with trocar site endometriosis 2 years after laparoscopic ovarian endometrial resection. Physical examination revealed a subcutaneous solid tumor with a diameter of 3 cm surrounding the scar of laparoscopic surgery in the right lower abdomen. Transabdominal ultrasonography showed a cystic tumor in the subcutaneous adipose layer of the right lower abdomen. The pathological diagnosis was poorly differentiated endometrioid carcinoma. Hysterectomy, bilateral salpingo-oophorectomy and pelvic lymphadenectomy were then perfor2022-01-01T00:00:00Z2022 May2025-04-04T19:31:37.758Z2025-02-19T02:57:58.535ZS-EPMC91032963556270310.1186/s12905-022-01749-3