Figure 4

A 85-year-old woman with adenocarcinoma. A, Preradiotherapeutic thin-section CT at the bone window shows no marked abnormality of the ribs. B, At 18 months after SRT, bone sclerosis of the rib adjacent to the lung tumor appeared (arrow). C, At 30 months after completion of SRT, multiple rib fractures with areas of sclerosis are seen. Pseudoarthrosis is present in one of the fractured bones (arrow head).