20 May 2019 It is a specific treatment for liver tumours. Millions of small radioactive beads, called microspheres, are injected directly into the tumour. Radioembolisation can be used in liver tumours not eligible for surgical removal. These tumours: May have originated in the liver (primary tumours); Or may be metastases of other liver tumours (secondary tumours). This article was written with the support of physicians and other clinical professionals from the Hospital da Luz network. The content published in the Health Guide is intended for the general public and is provided for informational and educational purposes only. It does not replace individual medical assessment, diagnosis, or personalized clinical advice from a qualified healthcare professional. The content is produced or reviewed by physicians and other healthcare professionals at Hospital da Luz and is based on the knowledge available at the time of publication or the most recent update, as indicated at the beginning of each item.