A disease, very common on Island and in the north of Europe goes under the name of "The viking disease. Officially the name is Dupuytrens contracter and is a contracture of the fingers, often the ringfinger and little finger is bent towards the palm of the hand. 9 out of 10, who gets thís disease are men, often after 40 years of age. It is inherited and uncurable.
Prince Joakim of Denmark has done an operation, which is one of the ways to handle the disease.
8 % of the Swedes have it, so perhaps they are of Viking origin.