title: Outcome of long interval radiological surveillance of side branch pancreatic duct-involved intraductal papillary mucinous neoplasm in selected patients.
abstract: Side branch IPMN (SB-IPMN) of the pancreas has a malignancy rate between 10 and 20%. We hypothesized that surveillance at longer intervals on selected patients with SB-IPMN might be indicated.
  
  
  
  This is a retrospective study of prospectively collected data of 276 patients presenting from 2000 to 2010. After 2007, we opted to screen our patients with longer intervals, initially at 12 months then 24 months using MR if no "worrisome features" were present.
  
  
  
  Complete data sets for 261 patients were analysed and patients were aged 78 (40-91) years. 232 patients had sole SB-IPMN while 92% were incidental (n = 209) and 8% were symptomatic (n = 24). Single SB-IPMN accounted for 84% (n = 195) of all cases; maximum diameter of 15.5 (5-60) mm. The median follow up duration was 46 (32-53) months. Short interval radiological surveillance (3-9 months) was 39% (n = 90), while long interval surveillance (12-36 months) was performed in 61% (n = 142). The rate of pancreatic resection, due to concern for the development of pancreatic cancer, in the short and long interval surveillance groups was 4.4% (n = 4) and 3.5% (n = 5) respectively; p = 0.78.
  
  
  
  Our data suggests no difference in outcome between long and short interval MR surveillance of SB-IPMN patients.
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK; The University of Leeds, Leeds, UK.
authors: Yazan S
authors: YS
authors: Khaled
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Muhammed
authors: M
authors: Mohsin
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Kavi
authors: K
authors: Fatania
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Ada
authors: A
authors: Yee
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Robert
authors: R
authors: Adair
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Maria
authors: M
authors: Sheridan
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Christian
authors: C
authors: Macutkiewicz
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK.
authors: Amer
authors: A
authors: Aldouri
authors: The Pancreato-Biliary Unit, St James's University Teaching Hospital, Leeds, UK; The University of Leeds, Leeds, UK. Electronic address: Andrewmsmith@nhs.net.
authors: Andrew M
authors: AM
authors: Smith
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D049448:Cholangiopancreatography, Magnetic Resonance; D016208:Databases, Factual; D018450:Disease Progression; D019160:Endosonography; D005260:Female; D006801:Humans; D053208:Kaplan-Meier Estimate; D008297:Male; D008875:Middle Aged; D018297:Neoplasms, Cystic, Mucinous, and Serous / Q000000981:diagnostic imaging* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D010180:Pancreatectomy; D010183:Pancreatic Ducts / Q000000981:diagnostic imaging* / Q000473:pathology / Q000601:surgery; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging* / Q000401:mortality / Q000473:pathology / Q000601:surgery; D011237:Predictive Value of Tests; D011379:Prognosis; D012189:Retrospective Studies; D012307:Risk Factors; D013997:Time Factors; D014057:Tomography, X-Ray Computed