Patient: Hello Professor! My female child is 4 years old and has a pectus excavatum on the left side. Will it affect the child’s future growth and health if the pectus excavatum is not treated surgically? Will the pectus excavatum get better or not develop as the child grows older? Please answer me. Thank you. Doctor: Generally speaking, the treatment of thoracic deformity needs to be judged according to the degree of the lesion of the child, and some related examinations need to be done to clarify whether there is any functional impact on the heart, lungs and other important organs. In particular, if there is an augmentation of the left sternum, it is also necessary to rule out the possibility of congenital heart disease. Therefore, it is recommended that you bring your child to the outpatient clinic for examination before determining the next treatment plan.