Surgical stress and postoperative complications related to regional and radical mastectomy in dogs.

Background: Surgery is the treatment of choice for regional control of mammary neoplasms in female dogs. Various surgical techniques may be used, as long as mammary gland anatomy, lymphatic drainage, and known prognostic factors are respected. The purpose of this study was to compare surgical stress-including duration of surgery, nociception and hematological changes-and postoperative complications in dogs undergoing regional and unilateral radical mastectomy.