A case of ovarian cancer derived from an endometrial cyst and treated by laparoscopic staging surgery

We experienced a case of ovarian cancer derived from a small endometrial cyst. Total simple hysterectomy, bilateral adnexectomy, and partial omentectomy were performed at the first operation, based on the pathological report of borderline tumor or more of the left ovary. The final pathological report of permanent specimens was endometrioid adenocarcinoma. Two weeks after the first operation, we performed laparoscopic staging surgery, including transperitoneal, laparoscopic paraaortic lymph node sampling. To date, we have performed transperitoneal, laparoscopic paraaortic lymph node dissection for 4 cases of ovarian cancer, including this case, and 6 cases of endometrial cancer. Our procedure is described here in detail. In this limited number of cases, the mean operative time was 132.6 minutes, mean blood loss was 88 ml, the mean number of retrieved paraaortic lymph nodes up to the left renal vein (up to B1) was 22.6, and the mean length of stay after this operation was 5.9 days. Severe complications were not observed in any of the cases, and there were no metastatic lymph nodes in this series. Our procedure of transperitoneal, laparoscopic paraaortic lymph node dissection appears safe and feasible.