Table 3 Features of false-negative lymph nodes evaluated by CT
Positive for LN involvement (n = 85) | Â | ||
|---|---|---|---|
Neck (n = 3) | Mediastinum (n = 40) | Abdomen (n = 42) | |
Shape of LN | |||
 Sphere | 1 (1.2%) | 9 (10.6%) | 20 (23.5%) |
 Oval | 2 (2.4%) | 23 (27.1%) | 18 (21.2%) |
 Flat | 0 | 8 (9.4%) | 4 (4.7%) |
Size (short axis) of LN (mm) | |||
≥ 10 | 0 | 1 (1.2%) | 1 (1.2%) |
 < 10 | 3 (3.5%) | 39 (45.9%) | 41 (48.2%) |
≥ 8 | 0 | 2 (2.4%) | 7 (8.2%) |
 < 8 | 3 (3.5%) | 38 (44.7%) | 35 (41.2%) |
≥ 5 | 2 (2.4%) | 19 (22.3%) | 21 (24.7%) |
 < 5 | 1 (1.2%) | 21 (24.7%) | 21 (24.7%) |
Attenuation | |||
 Hypo- | 0 | 8 (9.4%) | 8 (9.4%) |
 Iso- | 3 (3.5%) | 22 (25.9%)) | 25 (29.4%) |
 Hyper- | 0 | 10 (11.8%) | 9 (10.6%) |