Figure 2.

An 85-year-old man with a rib fracture after SRT. A, A preradiotherapeutic thin-section CT showing a spiculated nodule with air-containing spaces (arrow). B, Seven months later after SRT, CT shows edema of the right chest wall adjacent to the tumor, as evidenced by asymmetrical swelling and effacement of the fat planes (arrow). C, On follow-up CT at 13 months after SRT, thin-section CT with a bone window setting demonstrates thinning of cortex with mild sclerotic foci of the medulla in a rib. D, At 20 months after SRT, rib fracture with malalignment of the cortex is apparent (arrow).