Cases associating lichen planus and hepatitis C are increasingly being
reported. We observed three new cases, two males and one female aged
46, 63 and 56 years respectively. In all three cases, the lichen planu
s was limited to the oral cavity with erosion in two cases. Hepatitis
C was confirmed by 2nd generation ELISA. Two of the patients consulted
for lichen planus during the recovery phase after hepatitis C. In the
third patient, lichen planus preceded the hepatitis. These three case
s are further evidence favouring the hypothesis of a non-fortuitous as
sociation between lichen planus and hepatitis C. The hepatitis C virus
might induce an immune reaction leading both to lichen planus and chr
onic hepatitis.