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Autogenous costal cartilage grafts have gained the golden standard method in microtia reconstruction. Right now, there was no useful method to assess the quality of costal cartilage before microtia reconstruction surgery. The purpose of this study was to evaluate the role of ultrasonography in assessing costal cartilage in patients who were ready to do microtia reconstruction surgery. A prospective controlled study was conducted to collect 65 patients who underwent microtia reconstruction and underwent ultrasonography of costal cartilage