Collision tumor

Cantor JO, Adelglass J, Cerreta JM, et al. 1981. Collision tumor of the frontal sinus Evidence of prior intrasinus instillation of thorotrast. Laryngoscope 91 798-803. 

Fig. 9.31. Collision tumor of the ovary. CT at the level of the mid pelvis in a 65-year-old woman with sonographically suspected ovarian cancer. A cystic right adnexal mass is demonstrated showing multiple thin septa-tions and a 3-cm lesion with fat density and mural calcifications (asterisk). Pathologically, a collision tumor composed of a benign mucinous cystadenoma and a benign dermoid was diagnosed...

Kim SH, Kim YJ, Park BK et al (1999) Collision tumors of the ovary associated with teratoma clues to the correct preoperative diagnosis. J Comput Assist Tomogr 23 929-933... 

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