Image Assisted Optimization of Proton Radiation Therapy in Chordomas and Chondrosarcomas

Exclusion Criteria

• •Diagnosis other than chordoma or chondrosarcoma is made.
• •Patient refuses (parts) of the standard treatment protocol.
• •Patient refuses MRI due to claustrophobia.
• •Patient not suitable for MRI due to the presence of MRI incompatible implants.
• •Incapacitated patients.
• •Patient doesn't allow coded data to be used for analysis.
• •Patient is under 50 years of age.
• •Lesion size less than 1cm.
• •Patients with WHO 3 and higher.