EURORAD ESR

Case 1507

Omental infarction: sonographic and CT findings

Author(s)
A. Hollerweger, P. Macheiner
 
Patient
male, 35 year(s)
 
 
  • Figure 1
    Abdominal ultrasonography
     

    Sonography shows a moderately hyperechoic mass partially surrounded by a hypoechoic rim (arrows). The bowel wall of the adjacent caecum (arrowheads) is normal. During the patient's deep inspiration and expiration the...

     
    Area of Interest: unknown; Imaging Technique: Abdominal ultrasonography;

    On this sonogram the normal and gas-filled appendix (long arrow) is visible next to the infarcted omentum (short arrows).

     
    Area of Interest: unknown; Imaging Technique: Abdominal ultrasonography;

    The power-Doppler sonogram did not reveal any blood flow in the centre of the hyperechoic mass that represents the infarcted omentum (arrows). But moderately increased colour flow is visible in the surrounding tissue...

     
    Area of Interest: unknown; Imaging Technique: Abdominal ultrasonography;

    Follow-up examination 2 weeks later showed a decrease in lesion size and disappearance of the hypoechoic rim. The lesion was still adherent to the parietal peritoneum.

     
    Area of Interest: unknown; Imaging Technique: Abdominal ultrasonography;
     
     
  • Figure 2
    Abdominal CT
     

    A CT scan of the same region as Fig. 1 shows a fatty lesion with hyperattenuating streaks anterior to the caecum (short arrows). Thickening of the peritoneum is present (long arrow).

     
    Area of Interest: unknown; Imaging Technique: Abdominal CT;

    A CT scan at a lower level shows the normal and gas-filled appendix (long arrow), excluding acute appendicitis.

     
    Area of Interest: unknown; Imaging Technique: Abdominal CT;
     
     
Sonography shows a moderately hyperechoic mass partially surrounded by a hypoechoic rim (arrows). The bowel wall of the adjacent caecum (arrowheads) is normal. During the patient's deep inspiration and expiration the lesion was adherent to the peritoneum.
 
On this sonogram the normal and gas-filled appendix (long arrow) is visible next to the infarcted omentum (short arrows).
 
The power-Doppler sonogram did not reveal any blood flow in the centre of the hyperechoic mass that represents the infarcted omentum (arrows). But moderately increased colour flow is visible in the surrounding tissue as a consequence of the inflammatory reaction to the necrosis.
 
Follow-up examination 2 weeks later showed a decrease in lesion size and disappearance of the hypoechoic rim. The lesion was still adherent to the parietal peritoneum.
 
A CT scan of the same region as Fig. 1 shows a fatty lesion with hyperattenuating streaks anterior to the caecum (short arrows). Thickening of the peritoneum is present (long arrow).
 
A CT scan at a lower level shows the normal and gas-filled appendix (long arrow), excluding acute appendicitis.
 
 
 
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