Correlation between the Clival Parameters and the Volume of Translabyrinthine Corridor in Adults

The transclival and translabyrinthine corridors are frequently used to treat skull base lesions. We present the results of the correlation between the clival parameters and the volume of the translabyrinthine (TL) corridor. Seventy-six computed tomography scans of the temporal bone were selected. Exclusion criteria included patients <18 years of age, radiographic evidence of trauma, neoplasm, infection, or previous surgery. The images were analyzed using OsiriX MD (Bernex, Switzerland). We measured the clival length and clival surface area and the volume of the translabyrinthine corridor using a three-dimensional reconstruction. The average age was 49 years with 44% females. The mean clival length and surface area were 44.2 mm and 8.1 cm², respectively. The mean TL volume was 10.1 cm³, the clival surface area correlated positively with the TL volume (rho = 0.4, p < 0.05; [Fig. 1]). Our analysis revealed significant variability in the dimensions of these corridors in adults. We also found that a larger transclival window correlated with a larger TL corridor.

Fig. 1

Publication History

Article published online:
12 February 2021