[Using of a dismountable 3D-model of the collecting system with color segmentation to improve the learning curve of residents].

Aim: to determine the efficiency of using a non-biological dismountable 3D-model of the collecting system with color segmentation for better understanding of its anatomy by residents and to determine the optimal tactics of percutaneous nephrolithotomy (PNL).

Materials And Methods: 3D-models of the collecting system were developed based on CT data of 5 patients with staghorn stones, for whom PNL was planned. CT images were obtained in the Dicom format.

[Otogenic cerebellar abscess - two case histories].

Objective: The otogenic brain abscess remains a serious intracranial complication of otitis media despite advantages in diagnostics and antibiotic treatment during the last decades. We discuss the clinical picture and the possible ways of treatment by the example of two case histories.

Case Histories: Case 1: We report about a 38-year-old man, who was suffering in cholsteatoma since 30 years.