Question

a pelvic mass containing fat, calcification, and soft - tissue density on ct is most suggestive of: please select your answer... a ovarian fibroma b mature cystic teratoma (dermoid) c endometrioma d leiomyoma

Explanation:

Mature cystic teratoma (dermoid) is a germ - cell tumor that can contain elements from all three germ layers. Fat (from ectoderm - like sebum), calcification (from bone or teeth which are mesodermal or ectodermal derivatives in a sense of tissue origin in the tumor), and soft - tissue density (from various tissues like skin, hair follicles, etc.) are characteristic on CT.
Ovarian fibroma is a stromal tumor and usually does not have fat and calcification. Endometrioma is related to endometriosis and typically has a homogeneous appearance (like a "chocolate - cyst" appearance on imaging, no fat and calcification). Leiomyoma is a smooth muscle tumor and does not have fat and calcification in the way described.

Answer:

B. Mature cystic teratoma (dermoid)