“…4 The deformity may be classified as symmetric or asymmetric. 18 PEx deformity may worsen as one ages, and symmetric lesions may progress to more complex, asymmetric deformities, resulting in postural abnormalities, cardiac compression, and reduced lung volumes. 17,19 The clinical manifestations of PEx correspond to the severity of the chest wall defect, cardiopulmonary morbidity, and its psychosocial impact on patients' perceived appearances.…”