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Three cases of sternal segment dislocation in children are described. The primary mechanisms were direct blow in a 4-year-old boy, indirect forces in a 3-year-old boy, and osteomyelitis in a 10-year-old boy. The two former cases were dislocated at the junction of the manubrium with the sternal body, and the latter case was at the junction of the first and second sternal segments. The dislocated segments were gradually rotated for approximately 2 weeks and were finally stabilized after rotation. While in the dislocated state, the patients were observed conservatively, although all the dislocated segments were remodeled. Surgical treatment of sternal segment dislocation is not inevitable.