THE CRANIOMETRIC PARAMETERS OF THE PYRAMID OF THE TEMPORAL BONE AND THE PETROCLIVAL REGION IN VARIOUS FORMS OF THE POSTERIOR CRANIAL FOSSA

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Aim. The purpose of the study: was to study the craniometric parameters of the temporal bone pyramid and the petroclival region in various forms of the posterior cranial fossa (PCF) from spiral computed tomography (CT) data. Material and Methods. The length of the upper edge of the pyramid of the temporal bone (LP), the distance between the apexes of the pyramids (DAP), the length of the clivus (LC), the angle of convergence of the pyramid axes (AA), the angle of inclination of the clivus from the plane of the skull base (AC) to 160 CT patients with different forms PCF without the pathology of the bones of the skull and brain. To analyze the data, the program Statisitika 10. Results and Discussion. The length of the PCF depended on the LP (R=0.97, p<0.05). DAP predominated in wide fossa (R=0.50, p<0.05). The cranial clivus was significantly longer in the long form of PCF, compared with a short (p<0.01), greater was the magnitude AC (p<0.01). The size of the inner base of the posterior cranial fossa depended on the magnitude of the AA, which in the wide pit was an average of 5 more than the narrow one (p<0.05). Conclusions. The new data on the variability of the craniometric parameters of the apex of the pyramid of the temporal bone and the petroclival region, their dependence on the forms of the PCF, served as an anatomical basis for individual planning of operative approach to tumors of this localization.