[Occult mammary lesions: preoperative localization. Review of the literature].

The preoperative localisation of occult mammary lesions can be performed using fine needle biopsies, thus limiting esthetic damage in those patients in whom histological tests prove the lesion to be benign. Various methods have been proposed over the past 20 years. The purpose of this paper is to evaluate published data in order to determine which is the most appropriate method in terms of simplicity and efficacy.