[1]Department of Medical Oncology Complejo Hospitalario Universitario de Ourense SERGAS Ourense 32005 Spain;
[2]Department of Digestive Complejo Hospitalario Universitario de Ourense SERGAS Ourense 32005 Spain;
[3]Department of Pathology Hospital San Rafael A Coruna 15009 Spain;
Biliary tract; Case report; Immunotherapy; Malignant melanoma;