Fig. 7. 56-year-old male with left shoulder weakness after radiation therapy for metastatic lymph nodes in left supraclavicular area due to right lung.

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Fig. 7. 56-year-old male with left shoulder weakness after radiation therapy for metastatic lymph nodes in left supraclavicular area due to right lung cancer. Coronal fat-suppressed (FS) T2-weighted images (T2WIs) (A, B) and axial T2WI (C) showing marked T2 hyperintensity of left C6 (long arrow on A), C7 (short arrows on A and B), and C8 (long arrow on B and C) nerve roots caused by radiation-induced brachial plexopathy. There are atrophy, T2 hyperintense change, enhancement of left paravertebral (thick arrow on C and D), middle and posterior scalene (asterisk on C and D), and levator scapulae (dotted arrow on C and D) muscles secondary to plexopathy. Note that C8 nerve roots (long arrow on D) are also diffusely enhanced by contrast agent on axial contrast-enhanced FS T1-weighted image (D). Short arrows on C denote normal right C6 and C7 nerve roots in interscalene triangle. Fig. 7. 56-year-old male with left shoulder weakness after radiation therapy for metastatic lymph nodes in left supraclavicular area due to right lung cancer. Coronal fat-suppressed (FS) T2-weighted images (T2WIs) (A, B) and axial T2WI (C) showing marked T2 hyperintensity of left C6 (long arrow on A), C7 (short arrows on A and B), and C8 (long arrow on B and C) nerve roots caused . . . Korean J Radiol. 2017 Jan-Feb;18(1):180-193. https://doi.org/10.3348/kjr.2017.18.1.180