The patient is a 3-year-old child who has exhibited chest wall deformity since birth. As he aged, the deformity progressively worsened, ultimately leading to paradoxical breathing.

The chest wall is asymmetrical, with the 2nd, 3rd, and 4th costal cartilages and portions of the ribs missing on the right side. The right pectoralis major is absent, and the right-sided soft tissues are underdeveloped. However, the right upper limb and fingers, as well as other parts of the body, show no abnormalities.

Initially, two incisions were made—one on the right chest wall and another beside the sternum—to expose the pathological bone structure. A substantial defect was observed in the upper part of the right chest wall, covered by extremely thin soft tissue. MatrixRIBs were then used to reconstruct the right chest wall, reinforcing the localized bone structure and striving for maximal symmetry with the left side. The surgery lasted 50 minutes and was successfully completed, with the chest wall appearance substantially restored to normal postoperatively.