title: Serous cystadenomas of the pancreas: long-term follow-up measurement of growth rate.
abstract: OBJECTIVE
  To measure the growth rate of microcystic subtype serous adenomas of the pancreas diagnosed by imaging.
  
  
  METHODS
  For this retrospective study, 241 imaging studies were reviewed from 1998 to 2005. Thirty-one patients met our strict diagnostic imaging inclusion criteria and had at least 18 months of imaging follow-up. Patient demographics and lesion imaging characteristics were tested as predictors of growth.
  
  
  RESULTS
  Growth was measured over a mean period of 42 months. There was a significant (P = .0004) linear growth of tumour for the population. There was significant clustering (P = .001) of the population into 2 growth rates: 0.50 mm/y (n = 23) and 5.5 mm/y (n = 8). The diameter of the lesion at presentation was significantly correlated with growth (r = 0.45; P = .01).
  
  
  CONCLUSIONS
  The microcystic subtype of serous cystadenomas of the pancreas diagnosed with imaging criteria demonstrates 2 distinct and slow growth rates. The size of the lesion at presentation is correlated with growth rate.
authors.affiliation: Department of Medical Imaging, St Michael's Hospital, Toronto Ontario, Canada.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Menard
authors.forename: George
authors.initials: G
authors.lastname: Tomlinson
authors.forename: Sean
authors.initials: S
authors.lastname: Cleary
authors.forename: Alice
authors.initials: A
authors.lastname: Wei
authors.forename: Steven
authors.initials: S
authors.lastname: Gallinger
authors.forename: Masoom A
authors.initials: MA
authors.lastname: Haider
mesh_terms: D000328:Adult; D015897:Comorbidity; D003287:Contrast Media; D018293:Cystadenoma, Serous / Q000000981:diagnostic imaging / Q000473:pathology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D010190:Pancreatic Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D012189:Retrospective Studies; D036542:Tomography, Spiral Computed; D014463:Ultrasonography
chemical_list: D003287:Contrast Media