Kanzaki Sho, Araki Yasutomo, Okamoto Yasuhide, Kurita Akihiro, Ogawa Kaoru
Department of Otorhinolaryngology, School of Medicine, Keio University, Shinjuku, Tokyo 160-8582, Japan.
Auris Nasus Larynx. 2007 Mar;34(1):95-100. doi: 10.1016/j.anl.2006.05.016. Epub 2006 Aug 17.
We report a unique case of cholesterol granuloma (CG) surrounding the endolymphatic sac (ES). A 49-year-old man presented with the left side of sensorineural hearing loss, tinnitus, and vertigo. Magnetic resonance and computed tomography imaging revealed a CG surrounding the left ES. The patient initially underwent left transmastoid surgical resection of the tumor. At the time of surgery, brown fluid was aspirated from the tumor, but no other tumors were found. Histopathological examination revealed that the tumor contained cholesterol crystals, confirming the diagnosis of CG. At his 12-month postoperative follow-up, there was no evidence of recurrence. We discuss the radiology, pathology, and surgical removal of CGs surrounding ES.
