autoimmune hepatitis type 2
Tuesday 21 February 2006
LKM1-associated autoimmune hepatitis or anti-LKM1 chronic active hepatitis
Definition: Autoimmune hepatitis (AIH) type 2 is identified by the presence in the serum of anti-liver/kidney microsome type 1 autoantibody.
Type 2 AIH, characterized by anti-liver kidney microsomal antibodies. This form is rare in adults.
Anti-liver cytosol autoantibody has been reported in children with autoimmune liver disorders mostly in association with anti-liver/kidney microsome reactivity. However, its role as a sole marker of AIH type 2 is debated.
The autoimmune hepatitis type 2 (AIH type 2) affects predominantly pediatric patients and is characterized by a more severe clinical course, a higher frequency of relapse under immunosuppressive treatment and a more frequent progression to cirrhosis.
Type 2, which occurs in a younger age group, is associated with positive anti-liver kidney microsomal antibodies and is a more aggressive disease.
Treatment failure is more frequent and relapse after drug withdrawal is almost inevitable; most of these patients need lifelong immunosuppressive therapy.
- autoimmune hepatitis type 1
Bridoux-Henno L, Maggiore G, Johanet C, Fabre M, Vajro P, Dommergues JP, Reinert P, Bernard O. Features and outcome of autoimmune hepatitis type 2 presenting with isolated positivity for anti-liver cytosol antibody. Clin Gastroenterol Hepatol. 2004 Sep;2(9):825-30. PMID: #15354284#