ESTRO Brachytherapy for Prostate Cancer 2018

Margins ? ! ?

So margins for ………….

•

microscopic spread ?

•

peri-prostatic extension ?

•

subclinical disease ?

Δ CTV definition

ONE DEFINITION:

For prostate brachytherapy the

CTV corresponds to the visible contour

of the prostate expanded with a three-dimensional volume expansion

of 3 mm

This three-dimensional expansion can be constrained to the anterior rectal

wall (posterior direction) and the bladder neck (cranial direction).

In case of >T2 disease, the macroscopic extracapsular extension in taken

into account when contouring the prostate volume.