The Prevalence and Clinicopathological Characteristics of High-Grade Pancreatic Intraepithelial Neoplasia: Autopsy Study Evaluating the Entire Pancreatic Parenchyma.

Abstract:

OBJECTIVE:We sought to identify clinicopathological characteristics of high-grade pancreatic intraepithelial neoplasia (PanIN)/carcinoma in situ to facilitate screening for pancreatic ductal adenocarcinoma. METHODS:We evaluated PanIN lesions in 173 consecutive autopsy cases with no evidence of pancreatic ductal adenocarcinoma and/or intraductal papillary mucinous neoplasm (mean age, 80.5 years) by submitting the entire pancreas for microscopic examination. RESULTS:PanIN-3 was found in 4% of examined cases, whereas PanIN-1 and PanIN-2 were present in 77% and 28%, respectively. PanIN-3 was more frequently identified in patients with diabetes mellitus and/or older age. PanIN-3 lesions were always multifocal, and the number of PanIN-3 foci was positively associated with those of PanIN-1 or PanIN-2. PanIN-3 was located more frequently in the pancreatic body and tail than in the head and predominantly involved small interlobular/intralobular ducts rather than the main duct. Notably, 71% of pancreata with PanIN-3 showed cystic changes in PanIN-3 and lower grade PanIN lesions. PanIN-3 was also accompanied by higher grade extralobular fibrosis. CONCLUSIONS:We found that 4% of the examined pancreata harbored PanIN-3 lesions that were associated with several unique clinicopathological features. The cystic change along with fibrotic pancreatic parenchyma may be detected by imaging studies such as endoscopic ultrasound.

journal_name

Pancreas

journal_title

Pancreas

authors

Matsuda Y,Furukawa T,Yachida S,Nishimura M,Seki A,Nonaka K,Aida J,Takubo K,Ishiwata T,Kimura W,Arai T,Mino-Kenudson M

doi

10.1097/MPA.0000000000000786

subject

Has Abstract

pub_date

2017-05-01 00:00:00

pages

658-664

issue

5

eissn

0885-3177

issn

1536-4828

journal_volume

46

pub_type

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