Abstract

Purpose: Skin distances ≤6 mm have been consistently associated with unacceptable toxicity and suboptimal cosmetic outcome with the MammoSite®. However, skin distance only approximates the skin dose. With a single lumen device, the dose will depend not only on skin thickness but also on balloon diameter and dwell position location/weighting. On the currently accruing national phase III trial (RTOG 04-13/NSABP B-39), treatment is considered acceptable if the maximum skin dose is ≤145% of the prescription dose.

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