The incidence of hyperamylasaemia in serial serum amylase levels from patients with pancreatic pseudocysts is not well documented in the literature. Accordingly serial amylase levels were estimated in 5 patients with proven pancreatic pseudocysts. The majority of the values were normal or only minimally elevated. In contrast the amylase thermolability was persistently elevated and appeared to be a more sensitive measurement than serum amylase activity for indicating the presence of pancreatic pseudocysts.
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