[Difficulties in differential diagnosis of abdominal pain].

The authors discuss difficulties of differential diagnosis in acute abdominal pain; analyse cause of misdiagnosis in recurrent abdominal colicky pain, report three cases of mistakes in making diagnosis of acute pancreatitis, thrombosis of the mesenterial vessels in a patient with ischemic heart disease and chronic aneurysm of the left ventricular anterior wall, gastric ulcer complicated by hemorrhage in combination with new-onset diabetes mellitus with ketoacidosis.