Figure 1.

The detection of gallstones using CT or choledochoscope. A1, the gallstones in the Spiegel lobe; A2, the gallstones were removed by the choledochoscope; A3, the black arrow was the origin of Spiegel lobe branch; B1, the gallstones in the paracaval portion; B2, the gallstones were removed by the choledochoscope; B3, the black arrow was the confluence of Spiegel lobe and paracaval portion branch; C1, the gallstones in the caudate process; C2, the gallstones were removed by the choledochoscope; C3, the black arrow was the “comet tail sign”; CT = computed tomography.