[Importance of ultrasonic echolocation in the differential diagnosis and observation of the development of pancreatic pseudocysts].

Under observation there were 84 patients with pseudocysts of the pancreas, in 12 of them the main diagnostic method was ultrasonic echolocation. The differential diagnosis between the cyst and tumor was sometimes difficult. The most characteristic sign of the disintegrating tumor was a considerable and irregular thickening of the wall of the cavitary formation found. In four cases repeated ultrasonic examinations in dynamics made it possible to register the involution of pseudocysts which took place within 3-4 weeks after the onset of the disease.