Table 2 CT imaging features of the primary tumor in METex14 skipping-positive NSCLC

Subjects, n

15

4

11

Size

  Median (mm)

45.0 (33.0–70.0)

31.5 (26.0–37.5)

65.0 (37.5–77.5)

  Mass (> 30 mm), n (%)

12 (80.0)

2 (50.0)

10 (90.9)

  Nodule (≤ 30 mm), n (%)

3 (20.0)

2 (50.0)

1 (9.1)

Lobar location

  Upper lobe/upper segment, n (%)

12 (80.0)

3 (75.0)

9 (81.8)

  Middle lobe/lingular segment, n (%)

0 (0.0)

0 (0.0)

0 (0.0)

  Lower lobe, n (%)

3 (20.0)

1 (25.0)

2 (18.2)

Margin

  Invasion into surrounding tissue, n (%)

9 (60.0)

1 (25.0)

8 (72.7)

  Lobulation, n (%)

2 (13.3)

0 (0.0)

2 (18.2)

  Pleural indentation, n (%)

3 (20.0)

1 (25.0)

2 (18.2)

  Spicula, n (%)

3 (20.0)

1 (25.0)

2 (18.2)

  Ground-glass opacity, n (%)

1 (6.7)

1 (25.0)

0 (0.0)

Internal structure

  Air bronchograms, n (%)

2 (13.3)

1 (25.0)

1 (9.1)

  Cavitation, n (%)

2 (13.3)

0 (0.0)

2 (18.2)

  Internal low-density area, n (%)

10 (66.7)

0 (0.0)

10 (90.9)