Biliary Findings Assist in Predicting Enlargement of Intraductal Papillary Mucinous Neoplasms of the Pancreas

Juntaro Matsuzaki, Hidekazu Suzuki, Shigeo Okuda, Akihiro Tanimoto, Keiko Asakura, Seiichiro Fukuhara, Sawako Okada, Kenro Hirata, Hideki Mori, Tatsuhiro Masaoka, Hajime Higuchi, Shigenari Hozawa, Sachio Kuribayashi, Toru Takebayashi, Toshifumi Hibi

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Background & Aims: There is controversy over the optimal management strategy for patients with branch-duct type intraductal papillary mucinous neoplasms of the pancreas (BD-IPMNs), precursors to pancreatic cancer. We aimed to identify factors associated with the presence of BD-IPMNs and changes in their diameter. Methods: Two separate analyses were conducted in a cohort of patients who underwent magnetic resonance cholangiopancreatography (MRCP) in a single year (2006). MRCP findings and clinical outcomes of these patients were followed for a maximum of 6 years. We evaluated initial MRCP findings and demographics associated with the presence of BD-IPMNs at baseline and increase in BD-IPMN diameter over time. Results: During the follow-up period, 154 patients developed BD-IPMN and 322 patients did not. Older age, diabetes mellitus, gallbladder adenomyomatosis, and absence of gallstones were associated with the presence of BD-IPMNs at baseline. Increases in diameter of BD-IPMNs were associated with 3 baseline factors: BD-IPMN diameter greater than 17 mm, gallbladder adenomyomatosis, and a common bile duct diameter less than 5.5 mm. Patients with BD-IPMNs could be stratified into 4 groups with varying risk for the enlargement of BD-IPMNs over time: those with 3 risk factors (hazard ratio [HR], 11.4; 95% confidence interval [CI], 3.4-37.8), 2 risk factors (HR, 4.7; 95% CI, 1.7-12.8), or 1 risk factor (HR, 3.1; 95% CI, 1.2-8.2) compared with those without risk factors. Conclusions: For patients with BD-IPMNs, careful follow-up evaluation is particularly important for those with BD-IPMN >17 mm in size, common bile duct diameter <5.5 mm, or gallbladder adenomyomatosis.

Original languageEnglish
Pages (from-to)548-554
Number of pages7
JournalClinical Gastroenterology and Hepatology
Issue number5
Publication statusPublished - 2013 May


  • Imaging Results
  • Prognostic Factors
  • Progression
  • Tumor Development

ASJC Scopus subject areas

  • Hepatology
  • Gastroenterology


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