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Fig. 2B. —74-year-old woman with lung metastases from colorectal carcinoma. CT scan obtained 30 min after radiofrequency ablation shows metastatic lung lesions with clear "cockade phenomenon." Thin single arrow indicates treated nodule; double arrows indicate perilesional parenchymal tissue; triple arrows indicate inflamed, hyperemic, hyperdense parenchymal ring; thick arrow indicates minimal pneumothorax. We regard these radiologic finds to be in accordance with histologic descriptions reported by Miao et al. [29].