Table 1.

Expression of SOX9 in benign pancreatic tissue, pancreatic intraepithelial neoplasia and cystic neoplasms of the pancreas

Type of tissue	Number of cases	Negative (%)	Focal staining (%)	Diffuse staining (%)	P valueb
Benign pancreatic tissue	146
Normal	109	0 (0)	0 (0)	109 (100)
Chronic pancreatitis	37	0 (0)	0 (0)	37 (100)	1.00
Pancreatic intraepithelial neoplasia
Grade 1	18	0 (0)	0 (0)	18 (100)	1.00
Grade 2	21	0 (0)	6 (28.6)	15 (71.4)	<0.01
Grade 3	8	0 (0)	2 (25.0)	6 (75.0)	0.004
Intraductal Papillary Mucinous Neoplasm	21
Low Grade Dysplasia	13a	0 (0)	3 (23.1)	10 (76.9)	0.001
High Grade Dysplasia	11	0 (0)	2 (18.2)	11 (81.8)	0.01
Mucinous cystic neoplasm	14
Low Grade Dysplasia	14a	0 (0)	0 (0)	14 (100)	1.00
High Grade Dysplasia	3	0 (0)	0 (0)	3 (100)	1.00
Serous cystadenoma	10	0 (0)	0 (0)	10 (100)	1.00

^aIncluding three patients with both low-grade and high-grade dysplasia;

^bP values compared to normal pancreas