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Macroamylasemia: clinical and laboratory features in 7 patients
Abstract:
The clinical features of patients with macroamylasemia are diverse. A certain correlation between macroamylasemia and the disease of the pancreas or hepato-biliary system may exist, because among 7 patients in this series 4 patients were diagnosed as acute pancreatitis or relapsing pancreatitis and another patient was performed choledochotomy and manipulation of papilla of Vater may had a effect on pancreas. Among other 2 patients, one was completely symptomless and had no abnormal findings and in another the action of anticancer drugs is suspected. The course of macroamylasemia is usually chronic but in this series one patient had acute transient macroamylasemia and another one had intermittent macroamylasemia during exacerbations of pancreatitis. The serum amylase levels are mostly 2-4 times above normal with one exception (192 Somogyi units) and urinary amylase values are low with one exception (1922 Somogyi units) during exacerbation of pancreatitis. Characteristic zymogram of macroamylase on electrophoresis is also reported.
Insights
Macroamylasemia presents diverse clinical features, often correlating with pancreatic or hepato-biliary diseases. This condition typically follows a chronic course but can manifest acutely or intermittently.
Area of Science:
- Clinical Biochemistry
- Gastroenterology
Background:
- Macroamylasemia is a condition characterized by the presence of high molecular weight amylase complexes in the blood.
- Its clinical manifestations and associations are not fully understood.
Purpose of the Study:
- To describe the diverse clinical features of patients with macroamylasemia.
- To investigate potential correlations between macroamylasemia and pancreatic or hepato-biliary system diseases.
Main Methods:
- Case series analysis of seven patients with macroamylasemia.
- Clinical evaluation, including diagnosis of pancreatitis and hepato-biliary procedures.
- Serum and urinary amylase level measurements.
- Electrophoretic zymogram analysis.
Main Results:
- Four out of seven patients had acute or relapsing pancreatitis.
- One patient underwent choledochotomy, suggesting a potential pancreatic impact.
- One patient was asymptomatic, and another's macroamylasemia was suspected to be drug-induced.
- Serum amylase levels were elevated (2-4 times normal), while urinary amylase levels were generally low.
- Electrophoresis revealed a characteristic macroamylase zymogram.
Conclusions:
- Macroamylasemia exhibits varied clinical presentations.
- A potential association exists between macroamylasemia and pancreatic/hepato-biliary disorders.
- The condition can present acutely, chronically, or intermittently, with distinct biochemical profiles.