Ovarian mature cystic teratoma

Case contributed by Dr Mostafa El-Feky


A large pelvic lesion is noted on abdominal ultrasound

Patient Data

Age: 60 years
Gender: Female

A large rounded pelvic lesion is noted, averaging 11 cm in diameter with smooth wall, predominate fat content and a mural endophytic nodule showing coarse calcifications. It is epicentered upon the right adnexa, likely of right ovarian origin.

A right ovarian lesion is noted, averaging 11 cm and showing large areas of gross fat signal, as well as a mural endophytic plug showing calcifications and smooth outer contours.

Normal MRI pattern of the left ovary and adnexa. No cystic or solid lesions.

Case Discussion

MRI features of sizable ovarian mature cystic teratoma (teratodermoid). Ovarian mature cystic teratoma is a common ovarian neoplasm with rich fat content and is easily confirmed on MRI.  They are usually asymptomatic unless they grow to a large size, or in cases of torsion or rupture, then they can present by abdominal pain. Typically the presence of fat density and an osseous component (calcification) in a cystic ovarian lesion is enough to diagnose an ovarian dermoid with confidence. 

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