ABSTRACT
Ovarian dermoid is a neoplasm of germ cell origin, arising from elements of all three germ layers. There are three types of ovarian dermoid: mature cystic teratomas (dermoid cysts), immature teratomas and monodermal teratomas (i.e. those arising from single cell line, such as struma ovarii, carcinoid tumours and neural tumours)
The approach is as for any other indeterminate adnexal mass: • T2-weighted fast spin echo (FSE) sagittal and coronal
through the abdomen and pelvis with a large eld of view (FOV) and a slice thickness of 5 mm
• T1-weighted spin echo (SE) axial through the pelvis with a small FOV and a slice thickness of 3 mm
• T1-weighted fat-saturated (FS) axial through the pelvis with a small FOV and a slice thickness of less than 3 mm, with a gadolinium (Gd) enhancement sequence if needed in cases of atypical appearance
• T2-weighted SE axial through the pelvis with a small FOV and a slice thickness of 3 mm. If neither ovary is identied well, add T2-weighted axial sections perpendicular to the long axis of the uterus.
