Table 3.

Features of false-negative lymph nodes evaluated by CT

Positive for LN involvement (n = 85)
	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%)