Figure 13: A 59-year-old female, known case of postoperative and post radiotherapy carcinoma of the left breast with radiation plexitis. Axial fat-suppressed T2-weighted MR image shows smooth, diffuse thickening and abnormal high signal of the left BP (yellow arrow) without focal nodularity. Note the normal calibre and signal of right BP (white arrow). Mild atrophy and subtle T2 hyperintensity of muscles around the left shoulder (black arrow) owing to subacute denervation. Mild volume loss with few fibrotic changes are also noted in the left upper lobe (pink arrow), possibly radiation induced changes