case_images: PMC11823479_01
case_images: Incidental lesions observed on the gallbladder surface during laparoscopy. (A) Exophytic, darkly pigmented lesion identified during laparoscopic cholecystectomy. (B) Low-power view showing melanoma involvement of the gallbladder wall. (C) High-power view of melanoma cells with prominent nucleoli and dusky brown, coarsely pigmented cytoplasm. (D) Positive immunohistochemical staining for melanoma cocktail (courtesy of Dr. Ryan Bemke).
case_images: cureus-0017-00000077428-i01.jpg
case_images: PMC11823479_01_cureus-0017-00000077428-i01.jpg
case_images: FIG1
case_images: Intraoperatively, an exophytic, darkly pigmented lesion approximately 2 cm in size (Figure 1) was identified on the gallbladder, with no lesions observed on the visualized hepatic surface.