Malignant melanoma of the gallbladder. Case report and review of the literature.

The authors are presenting a new case of malignant melanoma of the gallbladder to be added to those described in the literature. The tumour appeared as a polypoid mass of the gallbladder and had metastasized to the jejunum and the brain. Review of the literature and analysis of this case require a thorough discussion of the real existence of tumours in this unusual primary site.