Table 4. The relationship between different forms and histological subtypes of peripheral lung cancer cavities.

Histological subtype	FDCW-I	FDCW-II	FDCW-III	FCCW-I	FCCW-II	Total
	n (%)	n (%)	n (%)	n (%)	n (%)	n (%)
Squamous cell carcinoma	19 (16.4)	15 (12.9)	39 (33.6)	2 (1.7)	3 (2.6)	78 (67.2)
Adenocarcinoma	5 (4.3)	2 (1.7)	10 (8.6)	1 (0.9)	2 (1.7)	20 (17.2)
Small cell carcinoma	2 (1.7)	1 (0.9)	5 (4.3)	1 (0.9)	0 (1.7)	9 (7.8)
Bronchioloalveolar carcinoma	1 (0.9)	0 (0.0)	3 (2.6)	0 (0.0)	0 (0.0)	4 (3.4)
Adenosquamous carcinoma	0 (0.0)	0 (0.0)	3 (2.6)	0 (0.0)	0 (0.0)	3 (2.6)
Large cell carcinoma	1 (0.9)	0 (0.0)	1 (0.9)	0 (0.0)	0 (0.0)	2 (1.7)
Total	28 (24.1)	18 (15.5)	61 (52.6)	4 (3.4)	5 (4.3)	116 (100)

FCCW-I and II, form concordance of cavity walls I and II; FDCW-I, II and III, form discordance of cavity walls I, II and III.