Isolated femoral mononeuropathy to the vastus lateralis: EMG and MRI findings

G. T. Carter, Craig M McDonald, T. T. Chan, A. J. Margherita

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


A 16-year-old female track athlete experienced sudden onset of right anterolateral thigh pain, initially thought to be cramping. After 2 months of continued postexercise pain she sought medical evaluation. A 3-cm thigh circumference discrepancy was noted on physical exam. She was referred for electromyography (EMG) and magnetic resonance imaging (MRI) studies. Femoral and screening nerve conduction studies were normal. Needle EMG revealed acute neuropathic changes confined to the right vastus lateralis only. These findings were confirmed by MRI, including short T1 inversion recovery (STIR) sequences. All other medical work-up was normal, including lumbar and pelvic MRI, and complete serologic studies. This case represents a unique presentation of an idiopathic femoral mononeuropathy isolated to the vastus lateralis only, which has not been previously reported. The highly unusual anatomical presentation of this case illustrates the emerging complementary usefulness of EMG and MRI in delineating neuromuscular pathology.

Original languageEnglish (US)
Pages (from-to)341-344
Number of pages4
JournalMuscle and Nerve
Issue number3
StatePublished - 1995

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)


Dive into the research topics of 'Isolated femoral mononeuropathy to the vastus lateralis: EMG and MRI findings'. Together they form a unique fingerprint.

Cite this