Erschienen in:
01.06.2012 | Hepatobiliary Tumors
Predictors for Microinvasion of Small Hepatocellular Carcinoma ≤2 cm
verfasst von:
Yo-ichi Yamashita, MD, PhD, Eiji Tsuijita, MD, PhD, Kazuki Takeishi, MD, Megumu Fujiwara, MD, PhD, Shinsuke Kira, MD, PhD, Masaki Mori, MD, PhD, Shinichi Aishima, MD, PhD, Akinobu Taketomi, MD, PhD, Ken Shirabe, MD, PhD, Terutoshi Ishida, MD, PhD, Yoshihiko Maehara, MD, PhD, FACS
Erschienen in:
Annals of Surgical Oncology
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Ausgabe 6/2012
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Abstract
Background
Hepatocellular carcinoma (HCC) ≤2 cm in diameter is considered to have a low potential for malignancy.
Methods
A retrospective review was undertaken of 149 patients with primary solitary HCC ≤2 cm who underwent initial hepatic resection between 1994 and 2010. The independent predictors of the microinvasion (MI) such as portal venous, hepatic vein, or bile duct infiltration and/or intrahepatic metastasis were identified by multivariate analysis. Prognosis of patients with HCC ≤2 cm accompanied by MI was compared to that of patients with HCC ≤2 cm without MI.
Results
Forty-three patients with HCC ≤2 cm had MI in patients (28.9%). Three independent predictors of the MI were revealed: invasive gross type (simple nodular type with extranodular growth or confluent multinodular type), des-γ-carboxy prothrombin (DCP) >100 mAU/ml, and poorly differentiated. Disease-free survival rates of patients with HCC ≤2 cm with MI (3 year 44%) were significantly worse than those for HCC ≤2 cm without MI (3 year 72%). This disadvantage of disease-free survival rate of patients with HCC ≤2 cm with MI could be dissolved by hepatic resection with a wide tumor margin of ≥5 mm (P = 0.04).
Conclusions
Even in cases of HCC ≤2 cm, patients who are suspected of having invasive gross type tumors in preoperative imaging diagnosis or who have a high DCP level (>100 mAU/ml) are at risk for MI. Therefore, in such patients, hepatic resection with a wide tumor margin should be recommended.