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  • Title: Serum insulin-like growth factor I evaluation as a useful tool for predicting the risk of developing hepatocellular carcinoma in patients with hepatitis C virus-related cirrhosis: a prospective study.
    Author: Mazziotti G, Sorvillo F, Morisco F, Carbone A, Rotondi M, Stornaiuolo G, Precone DF, Cioffi M, Gaeta GB, Caporaso N, Carella C.
    Journal: Cancer; 2002 Dec 15; 95(12):2539-45. PubMed ID: 12467068.
    Abstract:
    BACKGROUND: Although experimental studies have demonstrated an important role of insulin-like growth factor I (IGF-I) in hepatocarcinogenesis, the clinical data about IGF-I in patients with hepatocellular carcinoma (HCC) are scarce and controversial. To the authors' knowledge, this is the first prospective study investigating the longitudinal correlation between modifications in serum IGF-I levels and the development of HCC in a cohort of patients with hepatitis C virus (HCV)-related cirrhosis. METHODS: One hundred fourteen consecutive patients with HCV-related Child Grade A cirrhosis were followed prospectively at the Second University of Naples for 56.4 +/- 12.0 months with ultrasound examinations of the liver and serum alpha-fetoprotein determination every 6 months. At each clinical evaluation, the severity of disease was graded according to the established Child-Pugh scoring system. Serum IGF-I levels were measured prospectively at the study entry and at least every 12 months throughout follow-up. RESULTS: Twenty patients (19.2%) developed HCC during follow-up. Eleven of these patients had persistent Child Grade A cirrhosis for the whole study, whereas the other 9 patients developed HCC after their cirrhosis progressed from Child Grade A to Grade B. In patients who remained free of HCC for the whole study, serum IGF-I concentrations did not modify significantly during follow-up. Conversely, in patients who developed HCC, IGF-I levels decreased significantly during follow-up (from 72.6 +/- 29.9 microg/L to 33.8 +/- 14.5 microg/L; P = 0.001). In these patients, the significant decrease occurred both in patients with persistent Child Grade A cirrhosis and in patients with cirrhosis that progressed from Child Grade A to Grade B. The reduction in IGF-I level preceded the diagnosis of HCC by 9.3 +/- 3.1 months. CONCLUSIONS: This prospective study demonstrates that, in patients with HCV-related cirrhosis, 1) the development of HCC is accompanied by a significant reduction of serum IGF-I levels independent of the grade of impairment of liver function; and 2) modification of the IGF-I level precedes the morphologic appearance of HCC, permitting a precocious diagnosis of the tumor.
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