Abstract:
:Focal myositis is a rare inflammatory pseudotumor of skeletal muscle which usually has a benign course. We report a 56-year-old woman with a painful mass in the left arm with a radial nerve palsy. Magnetic resonance imaging (MRI) of the left arm showed a mass in the triceps muscle that was suggestive of a soft-tissue sarcoma. Electromyography showed a severe radial neuropathy involving both motor and sensory axons. An open biopsy showed focal myositis. Treatment with corticosteroids resulted in complete disappearance of the mass clinically and by MRI, without recurrence for more than 2 years. Radial nerve function also recovered completely. As a treatable cause of focal neuropathy, focal myositis should be included in the differential diagnosis of a muscle mass.
journal_name
Muscle Nervejournal_title
Muscle & nerveauthors
Alzagatiti BI,Bertorini TE,Horner LH,Maccarino VS,O'Brien Tdoi
10.1002/(sici)1097-4598(199907)22:7<956::aid-mus25subject
Has Abstractpub_date
1999-07-01 00:00:00pages
956-9issue
7eissn
0148-639Xissn
1097-4598pii
10.1002/(SICI)1097-4598(199907)22:7<956::AID-MUS25journal_volume
22pub_type
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