Singh S, et al. – In this study, researchers intended to present new finding in patients with pectus excavatum – left lower lobe anterior basal segment hyperinflation (LABSH). A secondary aim was to evaluate the prevalence of the new finding and correlation with pectus excavatum severity. The findings suggested that lobe anterior basal segment hyperinflation is a new sign associated with pectus excavatum. The sign demonstrates segmental bronchial compression caused by chest deformity results in segmental air trapping.