Macroenzymes are serum enzymes that have a higher molecular mass than the corresponding enzyme normally found in serum under physiologic or pathophysiologic conditions. Although no evidence convincingly indicates that macroenzymes cause disease or necessitate treatment, some patients with immunoglobulin-complexed enzyme disorders have previously been reported to have associated autoimmune diseases or malignant lesions. To address this issue, we reviewed the medical records of 42 patients in whom a macroenzyme had been detected during assessment at the Mayo Clinic between 1986 and 1990.
Source: wiktionary