Shedding of the skin as a reaction to radiotherapy. In its mildest form it is "dry" when the skin flakes in a powdery form. In a more severe form ("wet") the deeper layers of the skin are exposed. This form is particularly likely to occur where the skin is naturally moist and/or subject to friction i.e. in the axilla or under the breast during radiotherapy treatment.

Cancer which has not spread from its place of origin in a breast lobule (LCIS) or duct (DCIS).