Anal and Rectal Cancers - ASTRO
Anal and Rectal Cancers - ASTRO
Anal and Rectal Cancers - ASTRO
- TAGS
- anal
- rectal
- cancers
- astro
- www.astro.org
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Potential Limitations of IMRT<br />
• Highly conformal fields with steep dose fall off<br />
may underdose nodal regions at risk<br />
• Potential for higher regional failure rates<br />
• Cautionary report from McGill<br />
– 66 pts treated for anal SCC (40-3DCRT, 26 IMRT)<br />
– Increased Grade 3+ BM toxicity in IMRT grp (42% v<br />
17.5%)<br />
– 1 yr LR rate: 28.6% (IMRT) v. 15.2% (3DCRT)<br />
VVuong, PProc ASCO, ASCO 2008