[Metastasis from a malignant melanoma presenting as a gall bladder polyp].

Gall bladder polyps larger than 10 mm hold an increased risk of malignancy. In this case report, a metastasis from a superficial spreading malignant melanoma level IV presented as a large gall bladder polyp in a 52-year-old woman. The melanoma had been surgically resected eight years earlier. The most frequent distant metastatic sites of malignant melanoma are soft tissue, lung, liver, skin and brain, but metastasis to the gallbladder is rare. It is important to refer patients with large gall bladder polyps to centres with expertise in liver surgery.