IMRT

Foecal incontinence • Occurrence of urgency correlated to incontinence and frequency • No significant different toxicities with conv vs IRMT • All mean doses higher in the group with urgency • Mean dose < 30 Gy to the internal anal surface,

Constraints to pelvic muscle floor to reduce incontinence related complaints

< 10 Gy to the external anal surface <50 Gy to the puborectalis muscle <40 Gy to levator ani muscle

• Endorectal balloon: fewer complaints in this group (28pts)

Smeenk et al , 2012