Kidney neoplasms: renal halo sign after percutaneous radiofrequency ablation--incidence and clinical importance in 101 consecutive patients.

Purpose: To describe the incidence and clinical importance of the renal halo sign after percutaneous radiofrequency ablation (RFA) of renal neoplasms.

Materials And Methods: Institutional review board approval was obtained for this HIPAA-compliant retrospective study. The study population consisted of 101 consecutive patients with 106 solid renal neoplasms that were treated with percutaneous RFA.

Image-guided thermal ablation of nonresectable hepatic tumors using the Cool-Tip radiofrequency ablation system.

Percutaneous thermal ablation techniques have gained considerable attention as an alternative to surgery for the treatment of malignant liver tumors in selected patients. In particular, image-guided radiofrequency ablation (RFA) is increasingly being used for the local treatment of hepatocellular carcinoma, as well as for metastases to the liver. As a minimally invasive treatment option, this technique has several advantages compared with surgical resection.