case_images: PMC3475298_01
case_images: Image of polypoid mass attached to the gallbladder wall not showing acoustic shadow.
case_images: CRIM.SURGERY2012-693547.001.jpg
case_images: PMC3475298_01_CRIM.SURGERY2012-693547.001.jpg
case_images: fig1
case_images: Abdominal ultrasonography revealed increased thickness of the gallbladder wall (8 mm) and a lesion with surrounding fluid sized approximately 12 mm without acoustic shadow, which arose from the gallbladder wall and was consistent with a polyp (Figure 1).
case_images: Malign epithelial tumor consisting of atypical cells with large eosinophilic cytoplasm, vesicular nucleus, and prominent nucleolus, which showed infiltration nesting beneath the epithelium of the gallbladder. A dense melanin pigment within the cytoplasm of the tumor cells was also noted.
case_images: CRIM.SURGERY2012-693547.002.jpg
case_images: PMC3475298_01_CRIM.SURGERY2012-693547.002.jpg
case_images: fig2
case_images: A dense melanin pigment accumulation within the cytoplasm of the tumor cells was noted (Figure 2).