Adenocarcinoma of the endolymphatic sac: imaging features and preoperative embolization.

Adenocarcinoma arising from the endolymphatic sac is very rare. Its imaging features are nonspecific and the differential diagnosis involves mainly paraganglioma or aggressive meningioma. In our case, the blood supply to the tumor was identical to that found in glomus jugulotympanicum tumors and the patient benefitted from preoperative embolization.