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Following radiotherapy

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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The lower brachial plexus may be damaged as a result of irradiation of the axilla for breast carcinoma. The most likely cause is entrapment due to fibrosis. Onset may be delayed by 5-30 months following treatment.

It is distinguished from direct metastasis by the less severe pain, a less widespread lesion, and the absence of a Horner's syndrome.

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