Table 3: Immunohistochemical findings of central and peripheral squamous cell carcinomas.

CentralPeripheral value
Positive cases/total cases (%)

CK75/10 (50)16/30 (53)0.85
p639/9 (100)22/27 (81)0.16
CK146/9 (67)13/27 (48)0.34
TTF-11/10 (19)2/28 (7)0.77
Napsin A0/10 (0)0/28 (0)N/A
CK34 E1210/10 (100)27/30 (90)0.3
CK5/63/10 (30)11/29 (38)0.65
p538/10 (80)21/28 (75)0.56
Entrapped pneumocytes (CK7)1/10 (10)14/30 (47)0.04