 On study, 111In-ch806 is given by infusion into a vein over one hour. Blood samples to determine the amount of drug in the blood pharmacokinetics, are taken a number of times on the day of the 111 In-ch806 infusion; about every 2nd day for the first week; then 1 week, 2 weeks and 3 weeks after the infusion. Blood tests are also used to monitor general health and to see if the immune system recognises the infused antibody by making another antibody against it. Such a response is called anti-ch806 antibody or HACA. Gamma camera scans to see where 111 In-ch806 goes in the body are done right after the first infusion, and 3 more times over the next seven days. The scan takes about one hour each time. Visits for weekly follow up examinations and blood tests until 30 days after the infusion are combined with further gamma camera scans. Tumour is reassessed 30 days after the infusion using the same type of scans as at study entry. 