[Breast segments: a model for the prevention of deformities in conservative surgery for breast cancer].

Conservative breast cancer surgery requires an exact knowledge on the impact that local resection may have on the cosmetic result, and for this reason, the characteristics of each breast region must be taken into account. The segmentation theory helps to predict the consequences of local resection in each breast segment and, at the same time, optimise the choice of the best procedure for their prevention. Therefore, surgical planning based on segmentation of the breast would help us achieve a current objective of breast oncological surgery: a surgery adapted to the breast and the tumour. This article describes the different breast segments, their resources and limits for remodelling, and the best technical options to prevent deformities in each one of them.