This video demonstrates a laparoscopic left oophorectomy for a large probable mucinous cystadenoma with benign imaging and tumor markers. After confirming the absence of significant adhesions, the surgeon develops the retroperitoneal plane to identify the ureter before dividing the infundibulopelvic ligament safely. The operation emphasizes atraumatic handling of the ovarian cyst to avoid rupture and peritoneal contamination. The specimen is retrieved using an endobag, followed by a thorough inspection of the pelvis and upper abdomen to exclude occult disease. The video concludes with practical guidance on specimen retrieval strategies for different ovarian cysts and meticulous port closure