The survival period of chondromalacia varies from person to person, generally in the range of a few months to a few decades. Chondromalacia, also known as vitamin D deficiency rickets, is a disorder of calcium and phosphorus metabolism due to vitamin D deficiency, and clinically manifests itself as a disorder of bone calcification, with roughly no difference in prevalence between men and women. If the patient’s condition is mild, the survival period can be up to several decades; if the patient’s condition is serious, the survival period may only be a few months. Due to congenital hip dysplasia, patients with chondromalacia often have an unstable gait, followed by limited joint mobility, muscle atrophy and other related clinical manifestations. It is recommended that once diagnosed, parents should send their children to regular hospitals as soon as possible for standardized diagnosis and treatment, in order to maximize the survival time and improve the quality of life of the children.