The costal diaphragmatic sulcus is a kind of chest deformity, which is one of the manifestations of calcium deficiency in childhood. The location of costal diaphragm groove is the location of diaphragm, which is depressed by diaphragm because of rib dysplasia. Chicken breast and it is a disease. I don't think the surgical trauma caused by rib overgrowth is relatively large. You can cut off the rib and turn it over and fix it. The depression is not deep, there is no obvious compression on the contents of the chest cavity, or it has little effect on the vital capacity, so it is not necessary to deal with it, especially in adulthood, when the bones have been shaped. Milk and dairy products are good sources of calcium. In addition, it is also necessary to bask in the sun properly in winter or supplement vitamin D in moderation.