Evidently, the present study showed LDH level was significantly elevated than the upper normal limit without any correlation between LDH and severity of pectus excavatum (defined as Haller index, chest wall depression index, and cardiac compression index), and without other enzymes abnormalities (aspartate aminotransferase, alanine aminotransferase, and creatine phosphokinase). The gene discussed is GPT; the disease is Pectus excavatum.