The authors retrospectively analyse 39 patients affected by Conn's syndrome, which have been observed since 1985, and discuss the results of surgical approach using the new technologies. In particular, the introduction of laparoscopy, technique that has been applied almost exclusively since the last seven years, has revealed being the "gold standard" for the surgical treatment of this disease. The adrenal underlying lesions are indeed almost always monolateral, small in size and present very rarely malignancy in their biological behaviour. Furthermore, the authors, although lacking of personal experience, propose the possibility of a more conservative treatment of the adrenal lesions with a simple "enucleation", whose feasibility also in laparoscopy has recently been shown by some authors. Anyway, the Authors believe that this technique of a partial adrenalectomy could be chosen in selective cases of bilateral adenomas or hyperplasia or in those lesions which are placed in an easily accessible peripheral site.