Cholesterol granuloma surrounding the endolymphatic sac

Sho Kanzaki, Yasutomo Araki, Yasuhide Okamoto, Akihiro Kurita, Kaoru Ogawa

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalAuris Nasus Larynx
Issue number1
Publication statusPublished - 2007 Mar


  • Cholesterol granuloma
  • Endolymphatic sac
  • Surgery
  • Tumor

ASJC Scopus subject areas

  • Surgery
  • Otorhinolaryngology


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