Published in:
01-04-2019 | Classics in Abdominal Radiology
The “central dot sign” in acute epiploic appendagitis
Published in: Abdominal Radiology | Issue 4/2019
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The “central dot sign” is a characteristic radiological finding of acute epiploic appendagitis described on CT images [1]. This appearance is generated by a central, hyperattenuating, ill-defined round area within a well-circumscribed fat-density ovoid lesion. This latter is surrounded by a thin hyperdense rim that abuts the large bowel wall. Furthermore, the lesion is associated with fat stranding indicating acute inflammation (Fig. 1) [2].
Fig. 1
Schematic image of CT appearance of acute epiploic appendagitis. The fat-density ovoid lesion is surrounded by a thin high attenuation rim (“the hyperattenuating ring sign”) and abuts the anterior colonic wall. The central white circle marks the thrombosed vascular pedicle within the inflamed epiploic appendage (“central dot sign”). Fat stranding appears as ill-defined increased attenuation of the adjacent fat
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