Retroperitoneal tumor is extremely rare, and it happens in barely 3%–5% of teratomas. Despite the supply of advanced imaging techniques the medical specialty doctor ought to have in mind the expected anatomy of this kind of tumour. The aim of our study was to elaborate data regarding the expansion pattern and surgical anatomy of this kind of growth. Moreover, anatomical relationship to the duct gland was noted. Teratoma is Associate in nursing embryonic growth derived from tot potential cells that contain tissue from a minimum of 2 or a lot of typically 3 germ layers in variable proportions. It should contain mature and immature tissue parts furthermore as malignant parts.