UNASSIGNED: 3724 Background: Numerous publications during the last 3 years have reported on the successful treatment of @entity96 by means of radiofrequency with lower morbidity and mortality rate compared to surgery. This article reports our personal experience since 1998 with the RITA-radiofrequency ablation-system. METHODS: Local ablation are performed in @entity1 with impossibility of R0-resection or poor general condition (64.2%) and where liver metastasectomy is not indicated (18.3%). A radiofrequency electrode is placed under ultrasound control. This generate a local temperature of 80 to 120  C. The coagulation arises from heat transfer and is constantly monitored by means of 5 periferal temperature probes. Postoperative checks were carried out by means of 3-phases contrast enhanced CT within 1 week and then after 3,6,12,18 and 24 months. RESULTS: Since 1.4.1998 80 @entity1 with 248 @entity96 were treated during 109 ablation sessions. The median postoperative observation period of @entity1 with a follow up more than 6 months (71.2% of all @entity1 ) was 21 months. A complete ablation could be documented in 97.1% (239/246). The local recurrence rate was 8.7% (21/239). For @entity5 of less than 3 cm a local recurrence rate of 5.2% (4/76) has been documented with the older needles, compared to 0.98% (1/102) since the introduction of new ones. 4 @entity1 developed a @entity5572 , 2 of them were after a bilio-digestiv anastomosis, 1 @entity1 with a complicated infection of a venous port system. In one after right hemihepatectomy and ablation of a central located metastasis a @entity1157 occurred. CONCLUSIONS: The radiofrequency ablation is a new possibility in the effective and uncomplicated treatment of @entity96 . The very low rate of local recurrence in @entity5 of less than 3cm (0.98%) raises the question of whether @entity5 of such size can in future be treated by means of local radiofrequency ablation. At present the radiofrequency ablation is indicated in case of non resectable @entity96 or where a liver resection is not indicated. Caution is necessary in the case of @entity1 with biliodigestiv anastamosis and in any cases with potentially infectious situations. [Table: see text].

The local ablation with radiofrequency enables a safe and efficient treatment of small XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity5572 :: ('MESH:D008100', 'Disease') :: ['liver abscess'] @entity96 :: ('MESH:D008113', 'Disease') :: ['liver tumors'] @entity5 :: ('MESH:D009369', 'Disease') :: ['tumors'] @entity1157 :: ('MESH:D001649', 'Disease') :: ['bile duct stenosis']
@entity96 :: (MESH:D008113,Disease) :: ['liver tumors']
