Endolymphatic Sac Tumor in an Elderly Man

Papillary architecture is typical for this entity

The patient is not known to have Von Hippel Lindau Syndrome, which can be associated with this tumor. According to Expert Path, the differential diagnosis for endolymphatic sac tumor is middle ear adenoma, middle ear adenocarcinoma, metastatic renal cell carcinoma, metastatic papillary thyroid carcinoma, paraganglioma, choroid plexus papilloma, and ceruminous adenoma.