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INDICATIONS INTERSTITIAL TREATMENTS

➢ Interstitial brachytherapy is indicated in cases with a tumour thickness of > 5mm, and in irregular surfaces.

➢ Interspace between catheters 8–12mm. Several planes outside the skin can be used with external fixation adding bolus material in the empty spaces. A bolus over the skin in the treated area is advisory.

➢ Catheters must be at least 3mm under the skin surface to avoid late toxicity.