A 21-year-old woman visited another facility, complaining of pain in the coccygeal region. CT scans and MRI revealed a tumor on the posterior side of therectum. The woman was referred to our hospital in November 2009. Surgical resection was performed on the basis of a preoperative diagnosis of pelvic retroperitoneal cystic mass of about 7 cm in maximum dimension. For cosmetic reasons, the operation was carried out by single-incision laparoscopic surgery and with a transperineal approach. The resected tumor was histopathologically diagnosed as mature teratoma. The postoperative course was uneventful, and the surgical wound became almost invisible one year after surgery. To date, no report has been published on transperineal resection of sacral teratoma in adults via single-incision laparoscopic surgery. We report one such case, with reference to the literature.
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