Focal myositis presenting with radial nerve palsy

Alzagatiti, Bassam I.; Bertorini, Tulio E.; Horner, Linda H.; Maccarino, Virginia S.; O’Brien, Thomas F.

doi:10.1002/(sici)1097-4598(199907)22:7<956::aid-mus25>3.0.co;2-c

Cited by 21 publications

References 24 publications

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Focal myositis associated with S‐1 radiculopathy: Report of two cases

et al. 2004

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Two cases are described of pseudotumoral calf hypertrophy after laminectomy for a compressive S-1 radiculopathy. The serum creatine kinase (CK) level was normal or mildly elevated. T2-weighted magnetic resonance imaging (MRI) showed calf enlargement, with an increased signal of the medial head of the gastrocnemius muscle. Electromyography revealed fibrillation potentials and positive sharp waves, but no complex repetitive discharges in the affected gastrocnemius muscle, with motor unit potentials having mixed neurogenic and myopathic features. Muscle biopsy revealed a focal myositis associated with some features of denervation. A brief course of corticosteroids was followed by remission clinically and improvement in the MRI findings.

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Focal myositis associated with S‐1 radiculopathy: Report of two cases

et al. 2004

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Focal myopathy mimicking posterior interosseous nerve syndrome

Erdem¹,

Demirci²,

Tan³

2001

Muscle and Nerve

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A 25-year-old man developed weakness of extension of the right index, middle, and fourth fingers at the metacarpophalangeal joints, over 2 years. No sensory deficit was present. Nerve conduction studies, including the right radial nerve, were within normal limits. Needle electromyographic (EMG) examination showed myopathic changes that were limited to the right extensor digitorum communis and extensor indicis proprius muscles. An intravenous edrophonium chloride test had no effect on weakness and repetitive stimulation showed no significant decremental response. An EMG-guided open biopsy of the extensor digitorum communis muscle revealed severe myopathic changes. Evaluation for the cause of myopathic involvement was negative. After 13 months, clinical examination and electrophysiological studies showed no significant progression. This case exemplifies the fact that a focal myopathy may mimic an entrapment neuropathy.

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Subacute proximal entrapment neuropathy of the radial nerve at the hiatus radialis

et al. 2004

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Endogenous lesions of the radial nerve at the upper arm level and in the canalis spiralis are exceptional. Entrapment of the radial nerve in the hiatus radialis following forced arm movements, stretching, or as a consequence of pathologies of the surrounding tissue is known. We observed two patients suffering from a painful subacute middle radial nerve palsy with complete axonal degeneration caused by a lesion at the hiatus radialis, demonstrated by EMG, sonography, MRI, and surgical exploration. Successful nerve repair, in one case with a nerve graft, was performed. In both cases the most appropriate explanation was a focal neuritis with swelling of the nerve followed by strangulation at the hiatus radialis. In one case acute neuroborreliosis was the reason for the neuritis.

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Focal myositis presenting with radial nerve palsy

Cited by 21 publications

References 24 publications

Focal myositis associated with S‐1 radiculopathy: Report of two cases

Focal myositis associated with S‐1 radiculopathy: Report of two cases

Focal myopathy mimicking posterior interosseous nerve syndrome

Subacute proximal entrapment neuropathy of the radial nerve at the hiatus radialis

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