A 77-year-old woman was admitted to hospital with cholecystitis. After 8 days of antibiotic treatment she developed hypotension, weakness, and anemia. Abdominal computed tomography showed a tense gallbladder containing blood and a round nodule which enhanced after administration of contrast material (Figure [1]). Doppler ultrasonography showed a nodule with arterial flow and a “ying yang” pattern (Figure [2]), and selective angiography revealed an cystic artery pseudoaneurysm (Figure [3]). Metallic coils were used as embolization material and full occlusion of the aneurysmal sac was achieved.
Figure 1 Abdominal computed tomography showed blood and a nodule in the gallbladder.
Figure 2 Doppler ultrasonography showed a nodule with a “ying yang” pattern.
Figure 3 Selective angiography revealed a cystic artery pseudoaneurysm (arrow).
Hemorrhage into the gallbladder occurs rarely and can result from gangrenous cholecystitis, cystic artery pseudoaneurysm, varicose veins in the gallbladder wall, or tumors [1]. In this case hemorrhage was caused by a pseudoaneurysm. Cystic artery pseudoaneurysms can form secondary to atherosclerosis, or can follow trauma; they can also arise as a result of arterial wall erosion by local inflammatory processes such as cholecystitis [2]
[3]. The diagnosis is difficult but it may be suggested by abdominal computed tomography and Doppler ultrasonography. Angiography allows for both a definitive diagnosis and simultaneous therapeutic intervention [4].
Endoscopy_UCTN_Code_CCL_1AZ_2AN
