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Distinct patterns of peritumoral histological findings in subtypes of intraductal papillary mucinous neoplasms of the pancreas.
Ann Diagn Pathol 2015; 19(5):347-52AD

Abstract

Intraductal papillary mucinous neoplasms (IPMNs) of the pancreas are primary pancreatic neoplasms that can act as precursors to invasive adenocarcinoma of the pancreas. The peritumoral stroma has been increasingly recognized to play an important role in many types of tumors. Therefore, to investigate the clinicopathological significance of the peritumoral stroma in IPMNs, we examined the histological features of the peritumoral stroma in each subtype and histological grade of IPMNs. Eighty-two patients with IPMN, who underwent surgical resection, were reviewed clinicopathologically. Intraductal papillary mucinous neoplasms (86 lesions in total) were histologically subclassified into gastric (n = 51), intestinal (n = 22), pancreatobiliary (n = 11), and oncocytic (n = 2) subtypes. Peritumoral histological features between the gastric and intestinal subtypes were evaluated by each histological grade. The results showed that subepithelial edema and inflammatory cell infiltration were more commonly observed in the gastric subtype (74% and 79%, respectively) than in the intestinal subtype (12% and 25%, respectively) of low-grade IPMNs. On the other hand, mucus lakes were more commonly observed in the intestinal subtype (100%) than in the gastric subtype (0%) of high-grade IPMNs. In addition, pancreatobiliary subtype IPMNs tended to exhibit acute inflammation such as neutrophil predominance. This study showed that peritumoral histological features differed among subtypes of IPMNs from low-grade tumors. These differences suggest the possibility that each subtype of IPMNs has a distinct mechanism from an early stage of tumor progression, which is reflected in the properties of the peritumoral stroma.

Authors+Show Affiliations

Department of Diagnostic Pathology, Jichi Medical University Hospital, Tochigi 329-0498, Japan; Division of Gastroenterology and Hepatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo 153-8515, Japan.Department of Diagnostic Pathology, Jichi Medical University Hospital, Tochigi 329-0498, Japan.Department of Diagnostic Pathology, Jichi Medical University Hospital, Tochigi 329-0498, Japan.Department of Surgery, Jichi Medical University Hospital, Tochigi 329-0498, Japan.Department of Surgery, Jichi Medical University Hospital, Tochigi 329-0498, Japan.Division of Gastroenterology and Hepatology, Department of Internal Medicine, Toho University Ohashi Medical Center, Tokyo 153-8515, Japan.Department of Diagnostic Pathology, Jichi Medical University Hospital, Tochigi 329-0498, Japan. Electronic address: nfukushima@jichi.ac.jp.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26265194

Citation

Saito, Michihiro, et al. "Distinct Patterns of Peritumoral Histological Findings in Subtypes of Intraductal Papillary Mucinous Neoplasms of the Pancreas." Annals of Diagnostic Pathology, vol. 19, no. 5, 2015, pp. 347-52.
Saito M, Imada H, Suzuki T, et al. Distinct patterns of peritumoral histological findings in subtypes of intraductal papillary mucinous neoplasms of the pancreas. Ann Diagn Pathol. 2015;19(5):347-52.
Saito, M., Imada, H., Suzuki, T., Sata, N., Yasuda, Y., Maetani, I., & Fukushima, N. (2015). Distinct patterns of peritumoral histological findings in subtypes of intraductal papillary mucinous neoplasms of the pancreas. Annals of Diagnostic Pathology, 19(5), pp. 347-52. doi:10.1016/j.anndiagpath.2015.07.005.
Saito M, et al. Distinct Patterns of Peritumoral Histological Findings in Subtypes of Intraductal Papillary Mucinous Neoplasms of the Pancreas. Ann Diagn Pathol. 2015;19(5):347-52. PubMed PMID: 26265194.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Distinct patterns of peritumoral histological findings in subtypes of intraductal papillary mucinous neoplasms of the pancreas. AU - Saito,Michihiro, AU - Imada,Hiroki, AU - Suzuki,Tsukasa, AU - Sata,Naohiro, AU - Yasuda,Yoshikazu, AU - Maetani,Iruru, AU - Fukushima,Noriyoshi, Y1 - 2015/07/14/ PY - 2015/01/22/received PY - 2015/05/12/revised PY - 2015/07/11/accepted PY - 2015/8/13/entrez PY - 2015/8/13/pubmed PY - 2016/7/15/medline KW - Edema KW - Gastric subtype KW - Inflammatory cell KW - Intestinal subtype KW - Intraductal papillary mucinous neoplasm KW - Stroma SP - 347 EP - 52 JF - Annals of diagnostic pathology JO - Ann Diagn Pathol VL - 19 IS - 5 N2 - Intraductal papillary mucinous neoplasms (IPMNs) of the pancreas are primary pancreatic neoplasms that can act as precursors to invasive adenocarcinoma of the pancreas. The peritumoral stroma has been increasingly recognized to play an important role in many types of tumors. Therefore, to investigate the clinicopathological significance of the peritumoral stroma in IPMNs, we examined the histological features of the peritumoral stroma in each subtype and histological grade of IPMNs. Eighty-two patients with IPMN, who underwent surgical resection, were reviewed clinicopathologically. Intraductal papillary mucinous neoplasms (86 lesions in total) were histologically subclassified into gastric (n = 51), intestinal (n = 22), pancreatobiliary (n = 11), and oncocytic (n = 2) subtypes. Peritumoral histological features between the gastric and intestinal subtypes were evaluated by each histological grade. The results showed that subepithelial edema and inflammatory cell infiltration were more commonly observed in the gastric subtype (74% and 79%, respectively) than in the intestinal subtype (12% and 25%, respectively) of low-grade IPMNs. On the other hand, mucus lakes were more commonly observed in the intestinal subtype (100%) than in the gastric subtype (0%) of high-grade IPMNs. In addition, pancreatobiliary subtype IPMNs tended to exhibit acute inflammation such as neutrophil predominance. This study showed that peritumoral histological features differed among subtypes of IPMNs from low-grade tumors. These differences suggest the possibility that each subtype of IPMNs has a distinct mechanism from an early stage of tumor progression, which is reflected in the properties of the peritumoral stroma. SN - 1532-8198 UR - https://www.unboundmedicine.com/medline/citation/26265194/Distinct_patterns_of_peritumoral_histological_findings_in_subtypes_of_intraductal_papillary_mucinous_neoplasms_of_the_pancreas_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S1092-9134(15)00116-1 DB - PRIME DP - Unbound Medicine ER -