Stress fracture of the rib is comparatively rare. We experienced three cases of stress fracture of the rib in high school baseball players. Case 1 and 3 were pitchers and had an 8th rib fracture on the dominant side. Case 2 was a third baseman who developed a second rib fracture on the dominant side.
Diagnosis was based on a history of increased training, and bone scintigraphy which was a very useful examination for early stage diagnosis.
Early diagnosis and treatment are necessary for those players who develop symptoms of stress fracture.