The patient, a 3-year-old boy, has exhibited a localized depression on the right side of his chest wall. Initially, the deformity was mistakenly assumed to be caused by a calcium deficiency. Treatments with substantial doses of cod liver oil and calcium supplements were attempted, but there was no improvement.

The lower part of the right chest wall exhibited a depression affecting the middle portions of the 7th, 8th, and 9th ribs and the costal arch. The patient was diagnosed with depression of the right lateral chest wall.

An oblique incision was made on the surface above the depression to expose the deformed ribs. Then, two MatrixRIB bars were used to perform the Wang procedure, effectively correcting the depression. The surgery achieved satisfactory results, and the patient’s deformity was resolved.