What Causes Pectus Excavatum?
The precise cause of Pectus Excavatum is unknown, although most people with the condition develop symptoms at birth or early infancy. It may occur as a result of excessive growth of the connective tissue (cartilage) that joins the ribs to the breastbone (also known as the costochondral region), which causes an depression of the sternum. Equally, It might be caused by uncoordinated growth between the ribs and the chest. If the ribs grow faster than the expansion of the heart and lungs (which push the sternum outward), then the sternum will be pushed inward. Once this has occurred, the deformity either persists or gets worse.
Equally, while the vast majority of pectus excavatum cases are not associated with any other condition, some disorders may produce the hallmark sunken chest symptom of pectus excavatum. Possible conditions include the Marfn syndrome, Rickets and Scilosis.