[Anatomy of the axillary fossa: muscular arch of the latissimus dorsi, a trap for axillary curage and breast reconstruction].

During the dissection of 11 stiffs, we observed the presence of an accessory muscle in the axillary fossa, known as the dorsalis major muscle arch or axillary Carl Langer muscle. This is the main anatomical variation in the walls of the axillary region. This case was reported because of the low frequency of this variation in the axillary region, and the vital importance of incorporating the possible presence of these notions into axillary curage techniques, which may find themselves modified intraoperatively. Ignorance of the dorsalis major muscle arch may be the cause of intra- and postoperative complications during axillary curage or breast reconstruction using a dorsalis major flap.