At present, the putative clinical use of the musculocutaneous and ostomusculocutaneous serratus anterior flaps has been compromised by the risk of partial or total necrosis of the skin overlying the lower part of the serratus anterior muscle. Therefore, the aim of this study was to delineate a skin area vascularized by perforant musculocutaneous branches of arteries stemming from the lower segment of the anterior serrated muscle. Black ink was injected in thoracodorsal artery branches for the serratus anterior muscle in 50 human cadavers before the autopsies (the study was approved by the Institutional Review Board). The surface area of the labeled skin was determined and its borders delineated by means of transparent millimeter grid. Planimetry data were subsequently analyzed with the aid of PC computer program. The results show that the calculated mean surface area (143.79 +/- 2.68 x 2.077; range 138.22-149.36 cm2) of the skin vascularized by perforant musculocuaneous branches stemming from the lower segment of the anterior serrated muscle, can serve as a reliable guide for taking serratus anterior flap in any patient. Therefore, appropriately sized musculocutaneous or osteomusculocutaneous serratus anterior flap can be safely and efficiently used in plastic and reconstructive surgery.
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