CPB Ljubljana 2018 course book

GEC-ESTRO recommendations in skin brachytherapy

INTERSTITIAL BRACHYTHERAPY

• It is indicated in cases with tumour thickness of 5 mm or more, and in irregular surfaces. • Interspace between catheters 8-12 mm. Several planes outside the skin can be used with external fixation adding bolus material in the empty spaces. • Catheters must be at least 3 mm under the skin surface to avoid late toxicity. • A CT scan with marks is necessary to define the CTV plus margins. (lip ca with needles not necessary) • Dose: 3-5 Gy, twice a day 6 hours apart