“…To make the diagnosis, ultrasound has a prominent place in the detection and monitoring of dermoid cysts [5]. However, the limitation of ultrasonography is explained by its sensitivity, which does not allow to distinguish a secondary transformation from a TKM [6], although our patient did not benefit from a CT scan, This examination allows detection and characterization based on the detection of fat density in 88% of cases and on the identification of a Rokitanski protuberance in 91% of cases, easily recognized by its rounded shape, with clear internal borders, containing teeth, adipose tissue and connective tissue taking up the contrast medium late . On MRI, the appearance of the dermoid cyst is considered less characteristic, the fat, but also the hemorrhagic lesions appear hyperintense in T1, the introduction of the fat suppression sequence allows them to be differentiated [7].…”