168-169 / 2605
PROTONTHERAPY / SKULL
BASE, LOW GRADE
MALIGNANCIES
• Comprise mainly chordomas and low grade-
chondrosarcomas
• Paradigms of :
– Difficult surgical access
– Radioresistant types
– High proximity critical structures :
optic pathway,
brain stem, internal ears, temporal lobes, spinal cord ..
San Paolo, 2003