Table 1.

Difficult factor(s) in biopsy procedure

Causes	No. patients (n = 17)
Poor cooperation/poor breath holding capacity	17
Long biopsy path (lesion depth, >5 cm)	3
Small size (≤2 cm)	5
Flat lesion (lesion thickness, ≤1 cm)	2
Lesion covered by ribs or scapula	9
Pre-existing pneumothorax	1