Developmental breast abnormality, 2 stage correction of, second stage, involving surgery on both breasts with a combination of exchange of one or more tissue expanders for one or more implants (which must have at least a 10% volume difference), mastopexy or reduction mammaplasty, if: (a) there is a difference in breast volume, as demonstrated by an appropriate volumetric measurement technique, of at least: (i) 20% in normally shaped breasts; or (ii) 10% in tubular breasts or in breasts with abnormally high inframammary folds; and (b) photographic and/or diagnostic imaging evidence demonstrating the clinical need for this service is documented in the patient notes. Applicable only once per occasion on which the service is provided (Anaes.) (Assist.)