Demographics and frequency of the intermittently upturned omentum at CT.
OBJECTIVES
To describe the demographics and frequency of the intermittently upturned omentum at CT.


METHODS
We retrospectively reviewed abdominal CT scans of 336 consecutive patients (189 men and 147 women) who were imaged between June 1 and June 17, 2010 and who had prior comparison scans. Readers recorded the presence or absence of an intermittently upturned omentum, defined as a thick rind of fat interposed between the liver and the anterior abdominal wall seen on one but not the other scan. At chart review, we recorded patient demographics and other clinical characteristics (prior surgical history, presence of cirrhosis).


RESULTS
An intermittently upturned omentum was found in 10 of 336 (3.0%) patients. An intermittently upturned omentum was seen more commonly in men than in women (9 of 189 men, or 4.8% versus 1 of 147 women, or 0.7%, p=0.047) and in cirrhotics (4 of 37 cirrhotics, or 10.8% versus 6 of 299 non-cirrhotics, or 2.0%, p=0.023). In a sub-analysis of patients without prior abdominal surgery, this finding was again seen more commonly in men than women (7 of 163 men, or 4.3% versus 0 of 134 women, or 0%, p=0.018) and in cirrhotics (3 of 33 cirrhotics, or 9.1% versus 4 of 264 non-cirrhotics, or 1.5%, p=0.032).


CONCLUSIONS
An intermittently upturned omentum is not uncommon and is more frequently seen in men and in patients with cirrhosis who may have a larger anterior hepatic space.
['Penn|Alex|A|', 'Wang|Wilbur|W|', 'Wang|Zhen Jane|ZJ|', 'Yee|Judy|J|', 'Webb|Emily M|EM|', 'Yeh|Benjamin M|BM|']
D000293:Adolescent D000328:Adult D017677:Age Distribution D000368:Aged D000369:Aged, 80 and over D005260:Female D006801:Humans D015994:Incidence D008297:Male D008875:Middle Aged D009852:Omentum D010532:Peritoneal Diseases D015203:Reproducibility of Results D012307:Risk Factors D012495:San Francisco D012680:Sensitivity and Specificity D017678:Sex Distribution D014057:Tomography, X-Ray Computed D014102:Torsion Abnormality D055815:Young Adult
Upturned omentum CT Cirrhosis Greater omentum Omental torsion