US imaging of the musculocutaneous nerve

Alberto Stefano Tagliafico, Johan Michaud, Alessandra Marchetti, Isabella Garello, Luca Padua, Carlo Martinoli

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Purpose: To describe the potential value of high-resolution sonography for evaluation of the musculocutaneous nerve (MCN). Materials and methods: The normal anatomy of the MCN was evaluated on three cadaveric limbs and correlated with the US images obtained in 15 healthy subjects. Seven consecutive patients with MCN neuropathy were then evaluated with sonography using 17.5 and 12.5-MHz broadband linear array transducers. All patients had abnormal nerve conduction studies and underwent correlative MR imaging on a 1.5-T system. Results: One-to-one comparison between cadaveric specimens and sonographic images showed that the MCN can be reliably identified from the axilla through the elbow, including the lateral antebrachial cutaneous (LAbC) nerve. In the patients group with MCN neuropathy, sonography allowed detection of a wide spectrum of abnormalities. In 5/7 cases, a spindle neuroma was depicted in continuity with the nerve. In one case, US identified focal swelling of the nerve and in another case US was negative. The neuroma was hyperintense on T2-weighted sequences in 75% of cases. In one patient, the nerve showed Gd-enhancement on fat-suppressed T1-weighted sequences. The nerve was never detected on unenhanced T1-scans. Owing to its small-size and out-of-plane course, the MCN may be more reliably depicted with sonography rather than with MR imaging. Conclusions: US is promising for evaluating traumatic injuries of the MCN. By providing unique information on the entire course of the nerve, US can be used as a valuable complement of clinical and electrophysiologic findings.

Original languageEnglish
Pages (from-to)609-616
Number of pages8
JournalSkeletal Radiology
Volume40
Issue number5
DOIs
Publication statusPublished - May 2011

Fingerprint

Musculocutaneous Nerve
Ultrasonography
Neuroma
Axilla
Neural Conduction
Elbow
Transducers
Anatomy
Healthy Volunteers
Extremities
Fats
Skin
Wounds and Injuries

Keywords

  • Imaging
  • Injuries
  • MR
  • Musculocutaneous
  • Nerve
  • Pathology
  • US

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

Tagliafico, A. S., Michaud, J., Marchetti, A., Garello, I., Padua, L., & Martinoli, C. (2011). US imaging of the musculocutaneous nerve. Skeletal Radiology, 40(5), 609-616. https://doi.org/10.1007/s00256-010-1046-6

US imaging of the musculocutaneous nerve. / Tagliafico, Alberto Stefano; Michaud, Johan; Marchetti, Alessandra; Garello, Isabella; Padua, Luca; Martinoli, Carlo.

In: Skeletal Radiology, Vol. 40, No. 5, 05.2011, p. 609-616.

Research output: Contribution to journalArticle

Tagliafico, AS, Michaud, J, Marchetti, A, Garello, I, Padua, L & Martinoli, C 2011, 'US imaging of the musculocutaneous nerve', Skeletal Radiology, vol. 40, no. 5, pp. 609-616. https://doi.org/10.1007/s00256-010-1046-6
Tagliafico AS, Michaud J, Marchetti A, Garello I, Padua L, Martinoli C. US imaging of the musculocutaneous nerve. Skeletal Radiology. 2011 May;40(5):609-616. https://doi.org/10.1007/s00256-010-1046-6
Tagliafico, Alberto Stefano ; Michaud, Johan ; Marchetti, Alessandra ; Garello, Isabella ; Padua, Luca ; Martinoli, Carlo. / US imaging of the musculocutaneous nerve. In: Skeletal Radiology. 2011 ; Vol. 40, No. 5. pp. 609-616.
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AB - Purpose: To describe the potential value of high-resolution sonography for evaluation of the musculocutaneous nerve (MCN). Materials and methods: The normal anatomy of the MCN was evaluated on three cadaveric limbs and correlated with the US images obtained in 15 healthy subjects. Seven consecutive patients with MCN neuropathy were then evaluated with sonography using 17.5 and 12.5-MHz broadband linear array transducers. All patients had abnormal nerve conduction studies and underwent correlative MR imaging on a 1.5-T system. Results: One-to-one comparison between cadaveric specimens and sonographic images showed that the MCN can be reliably identified from the axilla through the elbow, including the lateral antebrachial cutaneous (LAbC) nerve. In the patients group with MCN neuropathy, sonography allowed detection of a wide spectrum of abnormalities. In 5/7 cases, a spindle neuroma was depicted in continuity with the nerve. In one case, US identified focal swelling of the nerve and in another case US was negative. The neuroma was hyperintense on T2-weighted sequences in 75% of cases. In one patient, the nerve showed Gd-enhancement on fat-suppressed T1-weighted sequences. The nerve was never detected on unenhanced T1-scans. Owing to its small-size and out-of-plane course, the MCN may be more reliably depicted with sonography rather than with MR imaging. Conclusions: US is promising for evaluating traumatic injuries of the MCN. By providing unique information on the entire course of the nerve, US can be used as a valuable complement of clinical and electrophysiologic findings.

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