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Clinical and electrodiagnostic findings in breast cancer patients with radiation‐induced brachial plexus neuropathy
Author(s) -
Mondrup K.,
Olsen N. K.,
Pfeiffer P.,
Rose C.
Publication year - 1990
Publication title -
acta neurologica scandinavica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.967
H-Index - 95
eISSN - 1600-0404
pISSN - 0001-6314
DOI - 10.1111/j.1600-0404.1990.tb00952.x
Subject(s) - medicine , brachial plexopathy , brachial plexus , weakness , electromyography , breast cancer , denervation , sensory loss , radiation therapy , anesthesia , muscle weakness , surgery , cancer , physical medicine and rehabilitation
The clinical and neurophysiological characteristics of radiation‐induced brachial plexopathy (RBP) were assessed in 79 breast cancer patients without signs of recurrent disease at least 60 months after radiotherapy (RT). Clinically, 35% (95% confidence limits: 25–47%) had RBP. Fifty percent (31–69%) had affection of the entire plexus, 18% (7–36%) of the upper trunk only, and 4% (1–18%) of the lower trunk. In 28% (14–48%), assessment of a definite level was not possible. In most, symptoms began during or immediately after RT, thus being without significant latency. Numbness or paresthesias (71%, 52–86%) and pain (43%, 25–62%) were the most prominent symptoms, while the most prominent objective signs were decreased or absent muscle stretch reflexes (93%, 77–99%) closely followed by sensory loss (82%, 64–93%) and weakness (71%, 52–86%). Neurophysiological investigations were carried out in 46 patients (58%). The most frequent abnormalities in patients with RBP were signs of chronic partial denervation with increased mean duration of individual motor unit potentials, and decreased amplitude of compound muscle and sensory action potentials. Nerve conduction velocities were normal.