title: Curative surgery for locally advanced retroperitoneal mature teratoma in an adult. Case report.
abstract: BACKGROUND
  Primary teratomas of retroperitoneum are not usual in the adult population. These tumors most commonly seen at the gonadal and sacrococcygeal regions. Herein we describe a case of an 18-year-old female who had a benign cystic teratoma at the retroperitoneum.
  
  
  METHODS
  The patient underwent an operation at another hospital following a misdiagnosis of hydatid cyst. The patient was referred to our hospital because of the detection of an unresectable tumor during her operation. A computerized tomography (CT)-angiography revealed a cystic mass, with a diameter of 14cm which was invaded into the retrohepatic suprarenal inferior vena cava and also extended to the posterior aspect of the liver. Additionally the mass invaded the posterior wall of the inferior vena cava and the right renal vein. The tumor was completely resected with a vascular resection. The inferior vena cava was reconstructed with a 12cm Dacron(®) graft and the renal vein was implanted. The patient's postoperative period was uneventful.
  
  
  CONCLUSIONS
  Germ cell tumors of retroperitoneum are usually seen in children, but there are also some reports of adult cases in the literature. Adult cases are especially seen in females. Imaging studies are paramount for diagnosis, preoperative strategy and safe surgical excision. CT scans and MRIs can identify various components of these tumors.
  
  
  CONCLUSIONS
  Even though primary retroperitoneal teratomas are quite rare in adults. Preoperative radiology imaging and strategy is critical for performing a safe surgery. The gold standard treatment strategy for this neoplasm is the surgical resection.
authors.affiliation: Department of General Surgery, Istanbul University, Istanbul Medical School, Istanbul, Turkey. Electronic address: isamilsarici@hotmail.com.
authors.forename: Inanc Samil
authors.initials: IS
authors.lastname: Sarici
authors.forename: Kursat Rahmi
authors.initials: KR
authors.lastname: Serin
authors.forename: Orhan
authors.initials: O
authors.lastname: Agcaoglu
authors.forename: Necip
authors.initials: N
authors.lastname: Akman
authors.forename: Adem
authors.initials: A
authors.lastname: Ucar
authors.forename: Orhan
authors.initials: O
authors.lastname: Bilge