Inpatients with C virus, liver biopsy is an essential examination for
diagnosis of chronic hepatitis. This examination evaluates the two bas
ic lesions of the disease: aggressivity and fibrosis. During antiviral
treatment, only liver biopsy is able to give precise details about li
ver lesions and no reliable serum test is yet available for the follow
-up. Molecular biology methods applied to liver sections for viral gen
ome detection will be of great interest for follow up and pathophysiol
ogy of the chronic disease. These sensitive techniques will supply abs
ence of any pathognomonic histological feature associated with C virus
in liver tissue.