Table 5 Recurrence rate of the primary and nodal neck lesions among the first and follow-up scans
NI-RADS | Primary lesion | Nodal lesion | Combined primary and nodal lesions | |||
|---|---|---|---|---|---|---|
First scan (%) | Follow-up scan (%) | First scan (%) | Follow-up scan (%) | First scan (%) | Follow-up scan (%) | |
NI-RADS 1 | 0/9 (0%) | 1/23 (4.3%) | 1/20 (5%) | 1/35 (2.9%) | 1/29 (3.4%) | 2/58 (3.4%) |
NI-RADS 2 | 4/15 (26.7%) | 3/12 (25%) | 1/5 (20%) | 1/3 (33.3%) | 5/20 (25%) | 4/15 (26.7%) |
NI-RADS 3 | 5/9 (55.6%) | 5/6 (83.3%) | 7/8 (87.5%) | 2/3 (66.7%) | 12/17 (70.6%) | 7/9 (77.8%) |
Total | 9/33 (27.3%) | 9/41 (22%) | 9/33 (27.3%) | 4/41 (9.8%) | 18/66 (27.3%) | 13/82 (15.8%) |