Revisiting the imaging appearance of neuromuscular choristoma versus lipomatous lesions of nerve: Nuancing the 50% rule

Nikhil K. Murthy, Kimberly K. Amrami, B. Matthew Howe, Stephen M. Broski, Jodi M. Carter, Robert Spinner

Research output: Contribution to journalArticlepeer-review

Abstract

Neuromuscular choristoma (NMC) is a rare benign peripheral nerve lesion characterized by mature skeletal or smooth muscle admixed with nerve fibers whereas lipomatosis of nerve (LN) is characterized by adipose tissue. We describe a case of a 49-year-old woman with a fat-containing mass associated with the brachial plexus appearing as a hibernoma, atypical LN, or atypical lipomatous tumor. Biopsy revealed pathognomonic histologic features of NMC. We suggest the 50% rule previously proposed to distinguish NMC from other fatty lesions be applied to the portion of the lesion with soft tissue elements, and not the lesion as a whole.

Original languageEnglish (US)
Article number101322
JournalInterdisciplinary Neurosurgery: Advanced Techniques and Case Management
Volume26
DOIs
StatePublished - Dec 2021

Keywords

  • Fibrolipomatous hamartoma
  • Lipomatosis
  • Magnetic resonance imaging
  • Neuromuscular choristoma
  • Peripheral nerve

ASJC Scopus subject areas

  • Surgery
  • Clinical Neurology

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