Middle ear, inner ear and temporal bone tumors - benign / nonneoplastic

Author: Nat Pernick, M.D. (see Authors page)

Revised: 23 February 2018, last major update October 2013

Copyright: (c) 2002-2018, PathologyOutlines.com, Inc.

PubMed Search: Lipochoristoma

Cite this page: Pernick, N. Lipochoristoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/earlipochoristoma.html. Accessed September 25th, 2018.
Definition / general
  • Also called lipomatous choristoma
  • Rare tumor of cranial nerve VIII within acoustic canal or cerebellopontine angle
  • May be a congenital malformation
  • Indolent behavior, in contrast to acoustic neuroma or meningioma
  • 70% men; associated with hearing loss
  • Conservative surgery with nerve preservation
Gross description
  • Arise from CN VIII (cochlear or vestibular branch), pink-ivory-gray-maroon, soft rubbery, unilateral
Microscopic (histologic) description
  • Normal nerve components (myelinated nerve branches, glia cells, neurons, small thin walled vessels), mature adipose tissue with variable amounts of mature fibrous tissue, tortuous thick walled vessels, smooth muscle bundles and skeletal muscle fibers
Microscopic (histologic) images

Images hosted on other servers:
Missing Image

Various images

Additional references