PMC8553437_01
(a) Plain phase of CT showed a low-intensity lesion in the neck of the gallbladder (arrow). (b, c) Arterial phase of the CT revealed a lesion that was contrasted in the neck of the gallbladder, which has an unclear border with the liver (arrow). (d) Endoscopic US showed an isoechoic lesion on the intraperitoneal side of the gallbladder (arrow), without any breakage in the gallbladder wall (arrowhead). CT: computed tomography; US: ultrasonography.
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Contrast-enhanced computed tomography (CT) revealed a 20 mm lesion that was contrasted in the neck of the gallbladder, which had an unclear border with the liver (Figures 1(a)-1(c)). Endoscopic US showed an isoechoic lesion on the intraperitoneal side of the gallbladder without a broken gallbladder wall (Figure 1(d)).
Macroscopic examination of the resected specimen identified gross appearance of a submucosal tumor in the neck of the gallbladder (arrow); the tumor appears to be a unilocular cyst filled with mucoid liquid (arrowhead).
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A macroscopic examination of the resected specimen showed a gross appearance of a submucosal tumor in the neck of the gallbladder, and the tumor was found to be a unilocular cyst filled with mucoid liquid (Figures 2(a) and 2(b)).
Histopathological specimen (hematoxylin-eosin staining) showed a cystic lesion with thin walls covered with ciliated epithelium, laid on a connective tissue with smooth muscle fibers (arrow), and the cyst (arrowhead) located just outside the gallbladder wall (dotted line). (a) x20 and (b) x400 original magnification.
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A postoperative pathological examination revealed a cystic lesion with thin walls covered with ciliated epithelium, which was laid on a connective tissue with smooth muscle fibers (Figure 3(a)). It was clearly separated from the gallbladder and located just outside the gallbladder wall without luminal communication (Figure 3(b)).