A case of self-limiting sternal tumor of childhood

A 2-year-old boy with a rapidly growing sternal mass was referred to our hospital. Computed tomography revealed a dumbbell-shaped mass with widening of the synchondrosis between the third and fourth elements of the sternal body. The mass significantly shrunk 3 days later, and completely disappeared 2 weeks later, as confirmed by palpation. A diagnosis of self-limiting sternal tumor of childhood was made based on characteristic imaging findings.