[Modest clinical benefits of ASAT analysis in today's health care. A case report of macro-ASAT giving rise to pathologically increased ASAT levels].

Aspartate aminotransferase (AST) may occur as a macroenzyme after forming a complex with immunoglobulins. The complex results in decreased plasma clearance and thus elevated AST levels. So far, macro-AST has only been described in a few patients. Here, we report a case of macro-AST in a healthy female. Clinicians should be aware of this phenomenon so that patients are not subjected to unnecessary investigations.