Table 6. Mean occupancy rate of tumor histomorphologic growth pattern (%).

Histomorphologic growth patterns	AIS	MIA	IA	P value
Lepidic pattern (%)	100.0	86.9±10.1	40.3±15.2	<0.001
Acinar pattern (%)	0	12.7±10.0	50.0±22.4	<0.001
Papillary pattern (%)	0	0.2±0.9	12.3±19.6	<0.001
Micropapillary pattern (%)	0	0	0
Solid pattern (%)	0	0	0

Invasive adenocarcinoma (n=17); acinar predominant (n=8); papillary predominant (n=3); lepidic predominant (n=6). AIS, adenocarcinoma in situ; MIA, minimally invasive adenocarcinoma; IA, invasive adenocarcinoma.