Peritoneal papillary serous cystadenocarcinoma at a previous laparoscopic trocar site

The peritoneum is a serous lining of mesothelial cells with rich vascular and lymphatic capillary networks that covers the abdominal and pelvic walls and organs. Peritoneal neoplasia can originate de novo from peritoneal tissues (primary) or invade or metastasize into the peritoneum from adjacent or remote organs (secondary). Many primary cancers originate from the peritoneum, some of which have been implicated in many cases of carcinomas of unknown primary origin. Ovarian cancer arising in women severalyearsafterabilateraloophorectomyisbelievedtobeone of these primary peritoneal cancers. Other described primary peritonealcancersandtumorsincludemalignantmesothelioma, benign papillary mesothelioma, desmoplastic small round-cell tumor, peritoneal angiosarcoma, leiomyomatosis peritonealis disseminata, and peritoneal hemangiomatosis. The patient in our case report had a past history of laparoscopic cystectomy for a left ovarian chocolate cyst. Three years after the operation, a mass in her left lower abdominal quadrant was noted under the scar of the trocar site of the previous laparoscopic procedure. An unmarried 38-year-old G0P0 woman had undergone laparoscopic cystectomy 3 years previously for a left ovarian chocolate cyst, by retaining the cyst in an endobag before pulling it out from the trocar site. She noted a palpable mass with tenderness in her left lower abdominal quadrant beginning 4 months previously. Ultrasonography showed a solid mass (5.0 cm 4.4 cm 4.7 cm) in her left pelvic wall. A clinical examination showed that the location of the peritoneal mass was just at the site of a trocar port of the previous laparoscopic operation.