Quantitative Proteomic Study of Human Lung Squamous Carcinoma and Normal Bronchial Epithelial Acquired by Laser Capture Microdissection

Table 5

S100A9 expression in various tissues by IHC.

Classification	Number	—	+	++–+++	𝑃 value
Squamous cell carcinomas	30	0	2	28	0.01^a
High differentiated	3	0	3	0	0.705^b
Moderately differentiated	11	9	2	0
Poorly differentiated	10	8	2	0
Normal lung tissue	20	0	10	10
Metastatic carcinoma	29	0	4	25	0.000^c
Other types	20	0	2	18	0.000^d

^a𝑃<0.05 by LSD, squamous cell carcinomas versus normal lung tissue. ^b𝑃>0.05 by ANOVA, high differentiated versus moderately versus poorly. ^c𝑃<0.05 by LSD, metastatic carcinoma versus normal lung tissue. ^d𝑃<0.05 by LSD, other types versus normal lung tissue.