Intradural contractions: spinal lipoma surgery with equivocal electromyography activity. Illustrative case
Electrically evoked lipoma contraction is a physiological signature suggestive of myolipoma and can refine the extent of safe untethering. Although IONM adds value beyond evoked potential mapping by eliciting myogenic contraction and helping discriminate resectable elements from neural structures, the resulting EMG tracing becomes difficult to interpret in the presence of muscle and detethering proceeds based on visual assessment. https://thejns.org/doi/10.3171/CASE25811.
Authors
- Aaron M. Yengo‐Kahn (ORCID: https://orcid.org/0000-0002-5989-3064)
- Fernando Cotrim Gomes (ORCID: https://orcid.org/0000-0003-0342-4207)
- M. Tran
- Aaron Sassoon
- Anuraag Tandon
- Ignacio Mesina- Estarron
- Rachel Zhang
Institutions
- Children's Hospital of Orange County (US)
- University of California, Los Angeles (US)
- University of California, Irvine (US)
- University of California, Irvine Medical Center (US)
- Samueli Institute (US)
Publication Details
- Journal
- Journal of Neurosurgery Case Lessons
- Published
- 2026-01-12
- DOI
- https://doi.org/10.3171/case25811
- Primary Topic
- Spinal Dysraphism and Malformations
- Type
- article
- Field-Weighted Citation Impact
- 0.00