Affiliation:
1. Department of Diagnostic Imaging, Fundación Santa Fe de Bogotá, Bogotá, Colombia
Abstract
Introduction:
Traumatic spinal root injury caused by shoulder dislocation may involve the
brachial plexus or, in some cases, a single nerve. The degree of severity of the injury depends on many
patient-specific factors as well as the mechanism of injury. It is essential to suspect this type of lesion
by means of a thorough physical examination in order to have better patient outcomes.
Case Presentation:
We presented the subtle magnetic resonance imaging (MRI) findings in a 35-yearold
male with left shoulder trauma and dislocation after falling off a bicycle. He complained of decreased
muscle strength and sensitivity in the C8 dermatome. Atrophy of the hypothenar region and
flexion deformity of the 4th and 5th digits were noted. Magnetic resonance imaging findings were consistent
with a partial preganglionic C8 motor root lesion. We found T2 increased signal intensity and
thinning of the intradural segment of the C8 motor nerve root and low signal in the sequence of a multi-
echo gradient recalled echo (GRE).
Conclusion:
MRI is a noninvasive tool that allows a detailed anatomical characterization of the nerves.
In brachial plexus injuries, the use of the GRE sequence is useful to identify the lesions, even if they
are subtle; however, some lesions may go unnoticed. It is important to note that these patients require
an interdisciplinary group to reach a correct diagnosis, which is vital to establish the appropriate treatment
and follow-up.
Publisher
Bentham Science Publishers Ltd.
Subject
Radiology, Nuclear Medicine and imaging