49. A 61-year-old woman presents to the pain clinic with a chief complaint of left
shoulder and arm pain for 3 years after undergoing radiation therapy for breast
cancer. Physical examination reveals lymphedema of the left axilla with noticeable
skin changes. Examination of the left supraclavicular area precipitates a sharp pain
that radiates down her left arm. Which of the following is likely diagnosis for her
clinical presentation ?
(A) Radiation-induced plexopathy
(B)Tumor metastasis
(C) Reflex sympathetic dystrophy
(D) Cervical radiculopathy
(E) Thrombangiitis obliterans