The stellate radiolucency observed in x-rays of gas-containing gallstones is characteristic and cannot be imitated or masked. Its recognition is important, since this may be the first and only indication of gallbladder disease and gallstones. In this case, cholecystography failed to result in visualization of the gallbladder. Gas-containing gallstones, though rare, are undoubtedly more common than the 30 published cases indicate.
Mark LK. GAS-CONTAINING GALLSTONES. JAMA. 1959;170(13):1531–1533. doi:10.1001/jama.1959.03010130035009
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