2016
DOI: 10.1007/s00261-016-0641-y
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The hyperattenuating ring sign of acute epiploic appendagitis

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Cited by 8 publications
(5 citation statements)
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“…The most common CT feature in EA [12] is an oval lesion usually smaller than 5 cm in diameter [13] , with the "hyperattenuating ring sign" [14] , which is a thin, hyperdense rim-enhancing lesion (thickness of 1 -3 mm), and the perilesional inflammatory fat attenuation [13] . Sigmoid colon and caecum are the most commonly involved sites of EA.…”
Section: Discussionmentioning
confidence: 99%
“…The most common CT feature in EA [12] is an oval lesion usually smaller than 5 cm in diameter [13] , with the "hyperattenuating ring sign" [14] , which is a thin, hyperdense rim-enhancing lesion (thickness of 1 -3 mm), and the perilesional inflammatory fat attenuation [13] . Sigmoid colon and caecum are the most commonly involved sites of EA.…”
Section: Discussionmentioning
confidence: 99%
“…In cases of acute epiploic appendagitis, US evaluation shows, in the patient's area of maximal tenderness, the presence of a small (2-4 cm in maximal diameter) rounded or ovoid, noncompressible, and hyperechoic mass adherent to the colonic wall, without internal blood flow on color or power Doppler studies, frequently surrounded by a subtle hypoechoic line [11, 16, 22, 23]. The typical CT findings in cases of acute epiploic appendagitis include the presence of rounded or ovoid fat-density mass adjacent to the colonic wall, usually less than 5 cm in diameter (typical diameter range: 1.5–3.5 cm) [11, 19], the “hyperattenuating/hyperdense ring sign” [24], a hyperdense enhancing rim (thickness of 1-3 mm) surrounding the lesion, and the perilesional inflammatory fat stranding [11]. A pathognomonic CT finding of epiploic appendagitis is the “central dot sign”, characterized by a central, ill-defined round area of high attenuation within the fat-density mass [25, 26].…”
Section: Discussionmentioning
confidence: 99%
“…5 Torsion of an appendage, followed by acute ischemia can cause necrosis of its adipose content, inflammation and localized peritoneal irritation. 13 The twisting of the appendages is predisposed by limited blood supply, by pedunculated form, by bulbous configuration, and high mobility. 10 Other causes such as bowel obstruction, hernia incarceration, lymphoid hyperplasia and bacterial invasion secondary to an abdominal infection have already been described.…”
Section: Anatomymentioning
confidence: 99%
“…The most frequent characteristics of this pathology in CT are paracolic oval mass, from 1 to 5cm, hypodense, with adipose content delimited by a halo with greater attenuation (the signal of the hiperatenuante ring), which is believed to portray the thrombosed appendage vessel (Figure 1). 3,4,13,16,17 A thickening of the parietal peritoneum can be observed, caused by the inflammatory process 18 . The thickness of the colon wall is usually not altered.…”
Section: Tomographic Findingsmentioning
confidence: 99%