Primary Malignant Melanoma of the Gallbladder: A Case Report and Review of the Literature

Figure 2

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.