Fissula ante fenestram

The fissula ante fenestram (plural (rarely seen): fissulae ante fenestras) is a small connective tissue-filled cleft located where the tendon of tensor tympani turns laterally toward the malleus. It is situated immediately anterior to the oval window, and posterior to the cochleariform process 1

The fissula ante fenestrum is the most common location of fenestral otosclerosis.

History and etymology

It is derived from the classical Latin:

  • fissula meaning a 'small cleft'
  • ante meaning 'forwards of'
  • fenestram (accusative form of fenestra) meaning 'window'.

i.e. 'the small cleft forwards of the window'

Head and neck anatomy
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Article information

rID: 9396
System: Head & Neck
Section: Anatomy
Synonyms or Alternate Spellings:
  • Fissula ante fenestram (FAF)

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Cases and figures

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    HRCT petrous bone...
    Figure 1: labelled as FAF
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