Asthma–chronic obstructive pulmonary disease (COPD) overlap syndrome (ACOS) is a commonly encountered yet loosely defined clinical entity. ACOS accounts for approximately 15–25% of the ...
Overlap syndromes show characteristics of both autoimmune hepatitis (AIH) and primary biliary cirrhosis (PBC), primary sclerosing cholangitis (PSC), or autoimmune cholangitis (AIC). (From Beuers U.