Ovarian collision tumor
MRI features of two distinct tumors in the same ovary (mucinous cystadenoma and mature teratoma) most consistent with an ovarian collision tumor (pathologically proven).
Ovarian collision tumors are considered as an uncommon ovarian neoplasm where there is co-existence of two adjacent but histologically distinct tumors in an ovary with no histologic admixture at the interface.
They are most commonly composed of ovarian teratoma (typically mature cystic teratoma of the ovary) and an ovarian cystadenoma or ovarian cystadenocarcinoma (typically mucinous).
Additional contributor: ZE. Boudiaf, MD, CHU, Constantine, Algeria