ESTRO Brachytherapy for Prostate Cancer 2018

Margins ? ! ?

So margins for ………….

•

microscopic spread ?

Δ CTV definition

•

peri-prostatic extension ?

•

subclinical disease ?

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.