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. Author manuscript; available in PMC: 2015 Mar 1.
Published in final edited form as: Hum Pathol. 2013 Oct 19;45(3):456–463. doi: 10.1016/j.humpath.2013.10.008

Table 2.

Percentage of positive tumor cells in pancreatic ductal adenocarcinoma and its precursor lesions

Types of tissue Number of cases Percentage of positive cells (%, Mean ± SD) P value
Pancreatic intraepithelial neoplasia
 Grade 1 18 78.9 ± 11.3
 Grade 2 21 54.5 ± 23.9 <0.01
 Grade 3 8 53.4 ± 25.2 0.002
Intraductal papillary mucinous neoplasm 21
 Low Grade Dysplasia 13* 50.8 ± 18.1
 High Grade Dysplasia 11 58.2 ± 19.0 0.34
Mucinous cystic neoplasm 14
 Low Grade Dysplasia 14* 78.6 ± 12.2
 High Grade Dysplasia 3 70.0 ± 20.0 0.33
Pancreatic ductal adenocarcinoma 136 68.0 ± 31.6 NA
*

Including three patients with both low-grade and high-grade dysplasia