Tumour staging: Bone scan, chest X-ray and liver ultrasound or CT scan of chest and abdomen within four weeks before start of treatment. Physical examination, conventional radiology (ultrasound and mammography including pre-treatment localization with carbon suspension) and functional imaging procedure (MRI or PET-CT or Contrast-Enhanced Ultrasound (CEUS) or Scintigraphy with 99m-Tc-HMPAO (Ceretec)) within two weeks before start of treatment.