Percutanous and intraoperative ultrasound-guided radiofrequency ablation of hepatic tumours.
OBJECTIVE
Ultrasonography (US)-guided Radiofrequency ablation (RFA) is increasingly used to treat liver tumours. The aim of this study was to evaluate the impact of multidisciplinary patient selection on clinical results.


METHODS
From January 2002 to December 2004, 69 consecutive patients with malignant hepatic tumours were presented to our clinic for RFA-treatment. After a multidisciplinary tumour board decision, 33 patients (47.8%) with 70 liver tumours underwent RFA using a 14-gauge needle electrode via a percutaneous (26) or surgical (7) approach, either alone or combined with resection (3) or chemoembolisation (3). 36 patients (52.2%) were excluded from RFA treatment, mainly because of extensive disease or failure of prior chemotherapy. With a median of 20 months (range 6 - 42 months), all 69 patients were followed clinically to assess survival, and the 33 patients who received additional treatment were examined by contrast-enhanced CT to assess local success.


RESULTS
Complete necrosis was obtained in 64/70 of ablated tumours (91.4%).The corresponding mean sizes (ranges) of lesion vs. necrosis achieved were 2.3 cm (0.9 - 5.0) vs. 3.7 cm (2.1 - 5.7). Two complications (6.6%) occurred, including one liver abscess and one postablational syndrome. At the time of the tumour board decision, the RFA (33) and non-RFA (36) group differed in mean sizes of tumours (2.3 vs. 3.5 cm), average tumours per patient (2.1 vs. 3.8), and failure of prior chemotherapy (2/33 vs. 22/36). From 36 patients judged to be ineligible for RFA, 24 (66.6%) underwent RFA at another institution. When comparing survival of patients who underwent RFA at our institution (33) vs. those who underwent RFA outside (24) vs. those who underwent no RFA (12), 1/33 (3%) vs. 9/24 (37.5%) vs. 8/12 (66.6%) died within 6 month and 27/33 (81.2%) vs. 5/24 (29.2%) vs. 2/12 (16.7%) were alive after 20 months median follow up.


CONCLUSIONS
US-guided RFA offers a safe local treatment option to destroy small liver tumours (< 3 cm). Carefully and multidisciplinary selected patients may derive benefit, but uncritical application leads to unsatisfying clinical results.
Stang
A
A
2. Medizinische Abteilung, Allgemeines Krankenhaus Altona, Hamburg, Germany. Axel.Stang@ak-alton.lbk-hh.de
Keles
H
H
von Seydewitz
C
C
Hentschke
S
S
Malzfeldt
E
E
Teichmann
W
W
Braumann
D
D
D003110:Colonic Neoplasms / Q000473:pathology; D003131:Combined Modality Therapy; D005260:Female; D006801:Humans; D008113:Liver Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology / Q000532:radiotherapy* / Q000556:secondary / Q000601:surgery; D008297:Male; D008875:Middle Aged; D016343:Monitoring, Intraoperative; D009336:Necrosis; D018579:Patient Selection; D011846:Radio Waves; D012189:Retrospective Studies; D016019:Survival Analysis; D014463:Ultrasonography