Cancer cells are dangerous foodies. They metabolise far greater amounts of sugar than healthy cells. This was discovered by the Nobel Laureate Otto Heinrich Warburg, born in Freiburg, as many as 80 years ago. However, it has only been possible for nuclear medicine experts to make use of Warburg’s findings on cancer cells’ craving for sugar since the advent of modern positron emission tomography (PET). This has led to an improvement in the quality of cancer treatment. Professor Wolfgang Weber, who has been head of the Department of Nuclear Medicine at the University Hospital of Freiburg for the past few months, is a renowned PET expert.