Abstract:

Retroperitoneal teratomas mainly occur in childhood with low incidence in adults. The disease is usually asymptomatic and preoperative definitive diagnosis is difficult. Giant teratomas in adults have high rate of malignancy, and complete surgical resection is recommended. We report an extremely rare case of giant mature teratoma retroperitoneal origin in an adult, whose huge size and complex anatomical location in the retroperitoneal space made the selection of surgical technique, surgical approach, and extent of resection clinically challenging. In this case, transperitoneal laparoscopic approach for resection of the huge pelvic retroperitoneal mass and hysteroscopic endometrial polypectomy were adopted after multidisciplinary consultation, analysis and discussion. The final pathological diagnosis of retroperitoneal mass was mature cystic teratoma, and the patient was discharged from hospital with stable condition after surgery. Neither recurrence nor metastasis was seen in the 4-month follow-up. This case aims to improve the understanding of this disease, enrich the clinical diagnosis and treatment experience, and reduce the misdiagnosis and underdiagnosis.

Key words: Retroperitoneal tumor, Laparoscopy, Teratoma, Diagnosis, Therapy