Prevalence of Germline Mutations Associated With Cancer Risk in Patients With Intraductal Papillary Mucinous...

Area of Science:

• Oncology
• Genetics
• Gastroenterology

Background:

• Pancreatic adenocarcinoma often presents with germline mutations increasing cancer risk.
• Intraductal papillary mucinous neoplasms (IPMNs) are precursors to some pancreatic cancers, but their association with germline mutations is unclear.

Purpose of the Study:

• To determine the prevalence of cancer-risk germline mutations in patients with histologically confirmed IPMNs.

Main Methods:

• Nontumor tissue samples from 315 surgically resected IPMN patients were analyzed.
• Sequencing of 94 cancer-associated genes was performed.
• Mutation prevalence was compared to the Exome Aggregation Consortium database.

Main Results:

• 23 patients (7.3%) had cancer-associated germline mutations; 9 (2.9%) had mutations linked to pancreatic cancer susceptibility.
• Increased prevalence of ATM, PTCH1, and SUFU mutations was observed in IPMN patients compared to controls.
• IPMN patients with pancreatic cancer-associated germline mutations had a higher likelihood of concurrent invasive pancreatic carcinoma.

Conclusions:

• Approximately 3% of IPMN patients harbor germline mutations associated with pancreatic cancer risk.
• Germline mutation analysis in IPMN patients may identify individuals at elevated risk for invasive pancreatic cancer.
• These findings suggest a potential role for genetic screening in IPMN management.