[Scanning electron microscopy of resected ureters in children with ureterohydronephrosis].

Using scanning electron microscopy, various portions of the ureter in reflux and obstructive ureterohydronephrosis in children were evaluated. In the first case, architectonics of the distal portions is preserved, while in the second case connective tissue is proliferated. Differences in the structure of proximal and distal portions in both forms of ureterohydronephrosis consist in inflammatory changes and violation of the integrity of the epithelial lining, edema and infiltration of the underlying layers, especially the inner muscle layer of the distal portion.

[Dysproteinemia and trace element dysbalance in urolithiasis in children].

The investigation of blood microelements by a highly sensitive neutron-activation method has shown an increased level of copper, zinc in the plasma, decreased content of iron, zinc in the plasma, decreased content of iron, manganese in erythrocytes, copper and manganese in the plasma of 75 children with calculous pyelonephritis as compared with healthy children. Besides, dysproteinemia was revealed depending on the activity and duration of the inflammatory process.