Fig. 10

Tumor persistence after treatment with image-guided percutaneous lung ablation. a Non-enhanced CT showing a single metastatic tumor in the upper right lobe in a patient with rectal carcinoma. b CT-guided RFA treatment using a straight probe, passing through the center of the tumor. c A non-enhanced CT was performed 24 h after treatment, showing the treated lesion (thick white arrow) surrounded by a ground-glass halo (triangle). However, the treated tumor's frontmost portion does not present a ground-glass halo (thin black arrow), which may correspond to incomplete treatment. d Contrast-enhanced CT scan performed three months after treatment shows a considerable increase in the treated lesion, which now presents nodular and irregular borders, consistent with tumor persistence