Neuromuscular choristoma presenting with unilateral limb hypoplasia in a 3-year-old boy

Travis G. O'Brien, Robert J. Spinner, Andrea J. Boon

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Introduction: Neuromuscular choristomas (NMCs) are rare benign peripheral nerve lesions in which skeletal muscle tissue is admixed with nerve fascicles. Methods: We describe a case of sciatic nerve NMC presenting with unilateral limb hypoplasia, monoparesis, and equinovarus contracture in a pediatric patient. We outline the unique clinical presentation and diagnostic work-up for our patient, including electromyographic and imaging studies. Results: MRI revealed fusiform enlargement of the sciatic nerve, <50% intralesional fat, and signal characteristics similar to those of muscle tissue. Ultrasound was utilized to characterize atrophy and fatty infiltration of affected muscles. The patient was treated conservatively with a customized physical therapy program and lower limb orthosis. Conclusions: Emerging diagnostic criteria are highlighted with the goal of distinguishing NMCs from more common peripheral nerve lesions. This can have important clinical consequences, as unnecessary biopsies are associated with aggressive fibromatosis, a potentially devastating complication. Muscle Nerve 54: 797–801, 2016.

Original languageEnglish (US)
Pages (from-to)797-801
Number of pages5
JournalMuscle and Nerve
Issue number4
StatePublished - Oct 1 2016


  • neuromuscular choristoma
  • neuromuscular ultrasound
  • pediatric neuromuscular disease
  • peripheral nerve lesion
  • post-biopsy fibromatosis

ASJC Scopus subject areas

  • Clinical Neurology
  • Physiology (medical)
  • Cellular and Molecular Neuroscience
  • Physiology


Dive into the research topics of 'Neuromuscular choristoma presenting with unilateral limb hypoplasia in a 3-year-old boy'. Together they form a unique fingerprint.

Cite this