Carcinomatous versus radiation‐induced brachial plexus neuropathy in breast cancer

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Abstract
A retrospective study was performed in 18 women in whom ipsilateral brachial plexus neuropathy developed after treatment for carcinoma of the breast. In the absence of metastatic tumor elsewhere, the only distinguishing feature between carcinomatous neuropathy and radiation-induced neuropathy was the symptom-free interval after mastectomy and radiation therapy. Women with an interval of less than a year have radiation-induced neuropathy. Brachial plexus exploration in difficult diagnostic situations will permit early treatment and avoid debilitating loss of function. Brachial plexus exploration for biopsy is safe and free of complications if performed carefully. Treatment of carcinomatous neuropathy is most likely to succeed if the tumor is hormonally sensitive, but radiotherapy may also be effective. Treatment of radiation-induced neuropathy remains ineffective.