RADIATION-INDUCED BRACHIAL PLEXOPATHY - MR AND CLINICAL FINDINGS

A 54-year-old man had a slowly progressive bilateral brachial plexopat hy 17 months after surgery and radiation therapy for a stage IV suprag lottic carcinoma, MR imaging at presentation showed a symmetric patter n of parascalene and interscalene hyperintense signal on T2-weighted i mages and after contrast enhancement. Although hyperintense signal has been more often associated with recurrent tumor than with delayed rad iation injury or fibrosis, the location and pattern of the signal abno rmalities suggested a diagnosis of radiation-induced plexopathy. This diagnosis was confirmed by the relative stability of the neurologic an d MR findings 30 months after treatment.