Gallbladder Melanoma, also known as malignant melanoma of gallbladder, is related to melanoma and juvenile xanthogranuloma. An important gene associated with Gallbladder Melanoma is PMEL (Premelanosome Protein), and among its related pathways/superpathways is GPR143 in melanocytes and retinal pigment epithelium cells. The drugs Nivolumab and Immune Checkpoint Inhibitors have been mentioned in the context of this disorder. Related phenotypes are pigmentation and integument