There are two types of protruding bones in the front of the chest: first, there are some prominent bony structures in the front of the chest at the position of the sternal stalk and the sternal body and the saber process itself, for example, there is a sternal angle at the position where the sternal stalk is connected to the sternal body, which is clearly felt as a prominent bony structure when touched with the hand. In addition, there is a saber process at the lowermost part of the sternum, and the saber process is also an obvious bony protrusion, which is also obvious when touched with the hand. Second, there may be chondrosarcoma in the anterior sternal bones, sternal stalk or sternal body, such as stimulation by trauma or congenital causes, which may induce the formation of chondrosarcoma in the sternal stalk and sternal body, and the protrusion can be felt when touched with the hand. In this case, a CT scan of the chest is usually required to see if the chondrosarcoma is present, and if it is present and has increased in size and surrounding symptoms, surgery is required to remove it.