Gas within gallstones on CT

Dunne, M.; Johnson, M.L.

doi:10.2214/ajr.134.5.1065

Cited by 13 publications

(7 citation statements)

References 4 publications

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“…Gallstones appear as an accumulation of high-level echoes and cast an acoustic shadow due to sound absorption, regardless of their size, shape, surface characteristics, composition, or presence of calcium [8,9]. Floating gallstones have been observed on real-time sonography after contrast cholecystography and in 2 reported cases of gas-containing gallstones without previous cholecystography [10,11]. To our knowledge, the phenomenon of reproducible high-level echoes within the acoustic shadow of a gallstone at a perpendicular transducer position as observed in Patients 1-3 (Table 1) has not yet been reported.…”

Section: Discussionmentioning

confidence: 99%

Appearance of gas-containing gallstones on sonography and computed tomography

Becker

Vock

1984

Gastrointest Radiol

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The diagnostic features of gas-containing gallstones on sonography and CT in 6 patients and the in vitro findings in 30 gas-containing gallstones are analyzed. On plain abdominal radiography, the stellate appearance of gas collections, though infrequent, is quite characteristic. On real-time sonography, gas-containing calculi can be observed to float within bile. Furthermore, larger gas collections within gallstones can be identified since they produce high-level echoes in the acoustic shadow of the stone, probably due to sound reverberation. These phenomena, although interesting, do not interfere with the high accuracy of sonography in the detection of gallstones. CT detects gallstones when their density differs from that of bile. Due to high-density resolution, even minute gas collections are displayed and can reveal gallstones with an isodense matrix. However, under routine abdominal scanning conditions (8 mm collimation), the gas collections often appear round or ovoid, because spatial resolution is inferior to that on plain radiography. This fact should be considered in the differential diagnosis of gas collections in the gallbladder region found on CT.

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Section: Discussionmentioning

confidence: 99%

Appearance of gas-containing gallstones on sonography and computed tomography

Becker

Vock

1984

Gastrointest Radiol

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“…Dunne and Johnson [2] described floating stones in a nonopacified gallbladder with ultrasound. With computed tomography these stones appeared as multiple stellate, floating radiolucencies in the gallbladder with CT numbers in the gas range.…”

Section: Discussionmentioning

confidence: 99%

Floating stones in a nonopacified gallbladder: Ultrasonographic sign of gas-containing gallstones

Strijk

Boetes

Rosenbusch

1981

Gastrointest Radiol

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“…It has been reported that up to 50% of gallstones are fissured. Less than half of these will contain gas and the remainder contain bile‐derived fluid …”

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Mercedes‐Benz emblem of gallstones

Wong

Ashour

2020

ANZ Journal of Surgery

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as operative resection with or without vascular reconstruction. 2,8 In our case, the aneurysm and aneurysmal neck were deemed to be too large for interventional radiology. His subsequent haemodynamic collapse required emergent ligation of the hepatic artery inflow and right hepatic outflow for control. Repair of the eroded anterior wall of the common hepatic duct with the aneurysmal wall over a T-tube acted as a temporizing measure in an unstable patient. Reconstruction of the bile duct by Hepp-Counaid Roux-en-Y hepaticojejunostomy was complicated by the loss of the hepatic artery. However, the maintenance of continuity of the common bile duct as demonstrated on follow-up T-tubogram aided biliary repair. Rupture of the hepatic arterial system into the biliary tree is a rare cause of haemobilia. It is most commonly a result of pseudoaneurysm rupture following biliary injury at cholecystectomy. We present a case of a ruptured mycotic pseudoaneurysm of the right hepatic artery secondary to gangrenous cholecystitis.

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Gas within gallstones on CT

Cited by 13 publications

References 4 publications

Appearance of gas-containing gallstones on sonography and computed tomography

Appearance of gas-containing gallstones on sonography and computed tomography

Floating stones in a nonopacified gallbladder: Ultrasonographic sign of gas-containing gallstones

Mercedes‐Benz emblem of gallstones

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