“…Decreases in the thickness of portal vein walls and in echogenic bands have been detected after praziquantel therapy (HOMEIDA et al, 1988;DOEHRING-SCHWERDTFEGER et al, 1989: OH-MAE et al, 1992WIEST et al, 1993;CAI>~ al., i997;GERSPACHER-LARA et aI, 1997;BOISIER et al, 1998). Assay of serum levels of fibrosis markers may be a useful supplementary tool for monitoring changes in liver fibrosis (SHAHIN et aZ., 1992;KARDORFF et al, 1997;OBERTI et al, 1997;ESTERRE et al, 1998;RICARD-BLUM et al, 1999).…”