Late-onset radiation-induced brachial plexopathy.

The late-onset variant of radiation-induced brachial plexopathy is most often seen after treatment for breast or lung cancers. It has an insidious onset, with symptoms noted years after receiving radiotherapy, and the condition gradually continues to deteriorate with time. We present the case of an elderly man who we saw in view of worsening paraesthesias and weakness of his left arm with associated prominent muscle wasting along the left shoulder girdle. Fifteen years prior to this, he had received radiotherapy for the treatment of nasopharyngeal carcinoma.