Name : Morteza
Family : Sanei Taheri
Affiliation :Radiology Department,Shohada Tajrish Hospital,SBMU
Academic Degree : Associate Professor of Radiology
Resident : kimiya mohammadi
Genital Female Imaging
Gender : Female
Age : 30
A 30years old woman with pelvic pain
CTscan without contrast of a 30years old woman shows a of fat density with several well- formed teeth within a cystic adnexal mass.
Discussion (Related Text)
Benign cystic teratoma or dermoid cyst, is the most common germ cell neoplasm of the ovary. Lesions contain mature elements derived from the ectoderm, mesoderm, or endoderm, resulting in a broad range of appearance. Mean patient age at discovery is 30 years. Most lesions are discovered incidentally while the patients are asymptomatic. The cysts are filled with liquid sebaceous material that is fat density on MR and CT. Internal contents include the Rokitansky nodule, which commonly includes hair, teeth, bone, or cartilage. US features are usually characteristic, eeth, bone, or cartilage. US features are usually characteristic, but lesions may be discovered or further characterized by MR or CT.MR shows sebaceous material as very high intensity on T1WI. Signal is usually decreased on T2WI approximating fat signal. Fat content is con- firmed by in-phase and out-of-phase gradient recall images or fre- quency selective fat-saturation images. CT demonstration of fat density within a cystic adnexal mass is definitive . CT and plain radiographs show bone and teeth formation within the mass .
Brant WE, Helms CA. Fundamentals of Diagnostic Radiology, 4rd edition