The early PET/CT examination will be performed at the Department of Nuclear Medicine at Odense University Hospital (OUH) using the tracer [18F]-fluorodeoxyglucose (FDG). Patients will be requested to appear in fasting state (minimum 6 hours) and will be administered intravenously FDG which is a radioactively labeled glucose-analog which enters cells by known glucose transport systems. The usage of FDG as cancer tracer is based on the increased metabolism and glucose demand of rapidly growing and proliferating cells. FDG remains within cells since it does not metabolize.