Article Figures & Data
Figures
- Fig. 1.
ADC on DWI and DTI. There is a very good Pearson correlation (r = 0.90, P < .001).
- Fig. 2.
A, MPNST. 3D STIR SPACE maximum-intensity-projection image in 56-year-old man presenting with a painless palpable mass in the right supraclavicular region for 6 months, which was steadily increasing in size with progressive weakness of right upper extremity. The mass involves the C5 and C6 nerve roots and upper trunk (arrow). B, Corresponding DTI shows disorganization and partial (near-complete) disruption of tracts (arrows). The ADC is 0.9 × 10−3 mm2/s.
- Fig. 3.
A, BPNST. 3D STIR SPACE maximum-intensity-projection image in a 34-year-old man presenting with a painless palpable mass in the right supraclavicular region. The mass remained stable during a 12-month period. The mass (large arrow) involves the distal right C7 nerve root (small arrow) and the upper trunk of the brachial plexus. B, Corresponding DTI shows swelling of the right C7 nerve root (small arrow) with partial disruption of the tracts (large arrow). The ADC is 1.7 × 10−3 mm2/s.
- Fig. 4.
A, Lymphoma. 3D STIR SPACE maximum-intensity-projection image in 65-year-old man presenting with progressively increasing weakness of the right arm during a few months. There was enlargement and abnormal hyperintense signal of multiple right brachial plexus nerve roots and trunks. The C6 nerve was the most abnormal (arrow). B, Corresponding DTI shows near-normal tracts. The ADC is 0.7 × 10−3 mm2/s.
- Fig. 5.
A, CMT 1A disease. 3D STIR SPACE maximum-intensity-projection image in a 28-year-old woman presenting with pain in the lower midline thoracic region for many months. A diffuse symmetrically enlarged brachial plexus was seen bilaterally (arrows). B, Corresponding DTI shows near-normal tracts (arrows), given the limitation of suboptimal SNR near the spine and peripheral areas. The ADC was 2.0 and 1.9 × 10−3 mm2/s on right and left sides, respectively.
Tables
Patient demographics and results
Patient Information Data Demographics and imaging No. = 29, male/female = 13:16, mean age = 41 ± 18 yr, range = 11–83 yr;a characteristics left/right = 9:21 lesions DTI ADC = 24 patients, DWI ADC = 21 patients No. of directions in DTI: 14 patients with 12, 10 patients with 20 directions, respectively Benign and malignant lesions Benign = 25, malignant = 5 No difference in terms of age (benign = 40 ± 18 versus malignant = 45 ± 19 yr), sex (benign, male/female = 12:13 versus malignant, male/female = 3:2) (P > .05), FA and ADC values (P >0.05);a DTI ADC different (P = .001), benign = 1.848 ± 0.40 versus malignant = 0.900 ± 0.25 × 10−3 mm2/s;a DWI ADC not different (P > .05), benign = 1.745 ± 0.44 vs malignant = 1.267 ± 0.35 × 10−3 mm2/s;a Interobserver reliability ADC: ICC = 0.988 (95% CI, 0.976–0.994), excellenta Abnormal and contralateral normal FA significantly different (P < .001), abnormal = 0.221 ± 0.09, normal = 0.344 ± 0.12;a nerves Interobserver reliability FA: ICC = 0.970 (95% CI, 0.946–0.991), excellenta DTI ADC among benign lesions between different (12 and 20) directions Not statistically different (P > .05) DTI ADC on 12 directions: 1.627 ± 0.600 DTI ADC on 20 directions: 1.520 ± 0.390 DTI ADC and DWI ADC Not statistically different (P > .05) ICC = 0.943 (95% CI, 0.836–0.980), excellent intermethod reliability Very good Pearson correlation (r = 0.90, P < .001) ↵a years.
