Korner'S Septum Ring. To evaluate the clinical importance of the petrosquamosal lamina (korner's septum [ks]), which is not only a bony plate dividing the mastoid cells at the level of antrum, but is also a lamina starting from the posterior aspect of the glenoid fossa that extends above the middle ear cavity and courses in an inferior direction lateral. Korner's septum at april 13, 2016.

The presence of körner’s septum was also investigated. The reported prevalence of ks varied between studies.