Isolated lesion of the lateral pectoral nerve due to repeate
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The lateral pectoral nerve (LPN) sub serves the proximal two-thirds of the pectoralis major muscle. It does not contain cutaneous sensory fibers. Clinical findings of lateral pectoral nerve injury include asymmetry of chest wall associated with atrophy and weakness of the pectoralis major muscle. Mononeuropathy of the lateral pectoral nerve occurs less frequently. In this report, we present two cases of progressive atrophy and weakness of the clavicular part of pectoralis major muscle innervated by the lateral pectoral nerve.

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