Matrix Stone Occupying an Entire Renal Collecting System: A Case Report and Video of Diagnostic Ureterorenoscopy

Renal matrix stones are a rare phenomenon and they present a diagnostic challenge due to their atypical radiological appearances in comparison to more commonly encountered renal tract calculi. We describe a case of known stone former presenting with loin pain and recurrent urinary tract infections who was diagnosed with a matrix stone. The video of the diagnostic flexiureterorenoscopy demonstrating the matrix stone occupying almost the entire right renal collecting system is also presented.

SYNTHESIS OF STRUCTURES OF CELLULAR-CONCRETE COMPOSITES WITH NANOSIZED COMPONENTS

The article reveals the results of one of the stages of the integrated research studying the influence of compounds and disperse characteristics of silica-containing materials on structure formation and qualities of cellular concrete. It has been indicated that the improvement of physical and mechanical properties of cellular concrete can be achieved through creating the best possible pore structure of the concrete and the structure of interporous frame as well as intensification of hydration and crystallization processes under hydrothermal treatment and, as a result, the increase in number and perfecting morphology of hydrated phases. Up-to-date knowledge about the structure and properties of cellular concrete shows potential capacities to enlarge strength characteristics through forming a nanopore structure of a matrix stone, the effective usage of power potential of multicomponent binding including Portland cement, high-calcium lime, activate silica components with grains of submicron and nanometer range.