Koerner septum

The Koerner septum, also known as the petrosquamous lamina or septum, is a thin bridge of bone which divides the petrous and squamous portion of the mastoid air cells at the level of the mastoid antrum. It represents the continuation and persistence of the petrosquamous suture 2.

It is commonly eroded by middle ear cholesteatomas.

History and etymology

Otto Körner (1858-1935), a German otorhinolaryngologist, described the septum petrosquamosum in 1926 3.

Anatomy: Head and neck

Anatomy: Head and neck

Article information

rID: 54470
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Körner's septum
  • Koerner's septae
  • Korner septum
  • Koerner's septa
  • Koerner's septum
  • Korner's septum
  • Koerner septa
  • Koerner septum

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