title: Risk factors for pancreatic anastomotic leakage: the significance of preoperative dynamic magnetic resonance imaging of the pancreas as a predictor of leakage.
abstract: BACKGROUND
  The histologic degree of pancreatic fibrosis can be assessed preoperatively by using the time-signal intensity curve (TIC) of the pancreas obtained from dynamic magnetic resonance imaging.
  
  
  METHODS
  To identify risk factors for postoperative pancreatic anastomotic leakage and to assess the impact of pancreatic TIC on this complication, 89 patients who underwent a pancreatic head resection with an end-to-side pancreaticojejunostomy between December 1998 and August 2005 were retrospectively reviewed. The pancreatic TIC profiles were classified into 3 types: type I, indicating a normal pancreas without fibrosis; and types II and III indicating fibrotic pancreas.
  
  
  RESULTS
  Pancreaticojejunal anastomotic leakage occurred in 14 patients (16%). In a univariate analysis, pancreatic texture (hard, 3% versus intermediate, 20% versus soft, 23%; p = 0.046), pancreatic duct size (> 3 mm, 8% versus <or= 3 mm, 25%; p = 0.037), and pancreatic TIC (types II, III, 3% versus type I, 25%; p = 0.006) were notably associated with pancreatic anastomotic leakage. In a multivariable analysis, pancreatic TIC (odds ratio [OR], 9.58; 95% CI, 1.1 to 91.7) was the only marked independent predictor of postoperative pancreatic leakage. A subanalysis of 52 patients with type I pancreatic TIC demonstrated hemoglobin A1c (odds ratio, 9.81; 95% CI, 1.2 to 127.9) to be a notable predictor of leakage and pancreatic leakage developed in diabetic patients with a high hemoglobin A1c concentration (> 6.0%) than in those with a normal hemoglobin A1c level.
  
  
  CONCLUSIONS
  Pancreatic TIC from dynamic MRI provides reliable information for predicting risk of pancreatic anastomotic leakage after pancreatic head resection. Especially in patients with type I pancreatic TIC, the presence of uncontrolled diabetes is considered a primary risk factor for postoperative pancreatic leakage.
authors.affiliation: Department of Transplantation and Digestive Surgery, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
authors.forename: Yoshitsugu
authors.initials: Y
authors.lastname: Tajima
authors.forename: Tamotsu
authors.initials: T
authors.lastname: Kuroki
authors.forename: Ryuji
authors.initials: R
authors.lastname: Tsutsumi
authors.forename: Kenzo
authors.initials: K
authors.lastname: Fukuda
authors.forename: Amane
authors.initials: A
authors.lastname: Kitasato
authors.forename: Tomohiko
authors.initials: T
authors.lastname: Adachi
authors.forename: Takehiro
authors.initials: T
authors.lastname: Mishima
authors.forename: Takashi
authors.initials: T
authors.lastname: Kanematsu
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000714:Anastomosis, Surgical / Q000009:adverse effects*; D016009:Chi-Square Distribution; D003287:Contrast Media; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010182:Pancreatic Diseases / Q000601:surgery*; D010193:Pancreaticojejunostomy; D011183:Postoperative Complications / Q000175:diagnosis*; D011237:Predictive Value of Tests; D012189:Retrospective Studies; D012307:Risk Factors; D018709:Statistics, Nonparametric
chemical_list: D003287:Contrast Media