title: Hypoechogenic embryologic ventral aspect of the head and uncinate process of the pancreas: in vitro correlation of US with histopathologic findings.
abstract: OBJECTIVE
  To evaluate the hypothesis that hypoechogenicity of the embryologic ventral aspect of the head of the pancreas is due to diminished fat content.
  
  
  METHODS
  Ultrasound and histopathologic findings in 13 pancreatic autopsy specimens were compared, and the prevalence of areas of hyperattenuation of the embryologic ventral aspect of the head of the pancreas at computed tomography (CT) was studied.
  
  
  RESULTS
  In vitro examination of pancreatic autopsy specimens showed this variant in seven (54%) of the 13 specimens, and histopathologic correlation confirmed that there is diminished fat content corresponding to the hypoechoic portion of the head of the pancreas. This difference in attenuation was visible on 21 (22%) of 96 CT scans. There was a statistically significant (P < .05, r = .212) increase in the prevalence of this finding with increasing age.
  
  
  CONCLUSIONS
  Hypoechogenicity of the embryologic ventral aspect of the head of the pancreas is due to diminished fat content. This difference in attenuation is also commonly seen on CT scans.
authors.affiliation: Department of Radiology, Montreal General Hospital, Quebec, Canada.
authors.forename: M
authors.initials: M
authors.lastname: Atri
authors.forename: S
authors.initials: S
authors.lastname: Nazarnia
authors.forename: A
authors.initials: A
authors.lastname: Mehio
authors.forename: C
authors.initials: C
authors.lastname: Reinhold
authors.forename: P M
authors.initials: PM
authors.lastname: Bret
mesh_terms: D000273:Adipose Tissue / Q000000981:diagnostic imaging / Q000473:pathology; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010179:Pancreas / Q000000981:diagnostic imaging* / Q000196:embryology / Q000473:pathology; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography