637 / 1542
OVER DOSAGE
• Example brachial
plexus
neuropathy (BPN) due to
radiation
• Overlap of radiation fields as a
result of change in position
between treatment of chest wall
and nodes
• BPN developed in 75%
• 100% with major move
• 63% with moderate move
When things go wrong-a lesson from history
Moderate move between fields
UNDER DOSAGE
• BPN due to disease recurrence