Radiology of retroperitoneal cystic teratoma in adult: a case report.

Retroperitoneal teratoma is a rare tumour in adults. A case is reported in which the radiologic pattern led to preoperative diagnosis of cystic teratoma, indicating surgical removal, which benefited the patient. However, size, calcification, and demonstration of cystic or solid components, are not predictive of benign tumour behaviour. Definite diagnosis was made possible by histopathology.