Ablation for Lung Tumors
Department of Radiology and 2nd Surgery1),
Osaka City University, Medical School
Toshiyuki Matsuoka, Akira Yamamoto, Yoshimasa Oyama,
Tomohisa Okuma, Saori Tanaka, Terue Okamura, Kenji Nakamura,
Ryusaku Yamada, Yuichi Inoue, Kiyotoshi Inoue1), Tatsuya
Department of Radiology, Kobe Nishi Shimin Hospital
Recently, radiofrequency-based procedures have been widely used
for the treatment of malignant tumors, and satisfactory clinical
results have been reported for the treatment of liver tumor.
However, the clinical benefit of regarding RFA(radiofrequency
ablation) for lung tumors has not yet been established. Here,
we demonstrate the basic concepts and clinical applications,
and evaluate the technical safety and efficacy of this procedure.
Since June 2000, 26 pulmonary tumors were treated using percutaneous
RFA with LeVeen Needle. The procedure was performed under CT
guidance after local anesthesia. Tumor ablation was performed
using lower output energy under 70 watts compared with the cases
of liver tumors. Pneumothorax and mild fever were observed in
about one half of cases, but there were no severe complications.
On CT images obtained after ablation, ground glass-like round
high density appeared and then it was slightly reduced. Mean
observation period was 8.9 months. Four of 26 tumors became scarred,
of which 3 which were incompletely ablated due to pain relapsed.
Although more time will be needed to adequately evaluate the
outcome, percutaneous radiofrequency ablation is technically
easy, and appears useful as a new method of treatment for lung
● Radiofrequency ablation
● Lung tumor
● Thermal coagulation