aditus ad antrum


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aditus ad antrum

The recess of the tympanic cavity that leads from the epitympanic recess to the tympanic antrum.
See also: aditus
References in periodicals archive ?
Radiological signs indicating cholesteatoma in the attic included erosion or destruction of scutum or spur (the lateral wall of the attic), widening of the aditus ad antrum (loss of figure of "8" appearance) , antral wall erosions and widening , ossicular erosions and destruction , medial attic wall erosion which may lead to facial nerve canal involvement, which may cause paresis or paralysis , erosion of the lateral semicircular canal which may result into fistula formation (Figure 1), dehiscence of tegmen tympani , dehiscence of sigmoid sinus plate, erosion of the external auditory canal (EAC), and automastoidectomy.
These changes when associated with bony expansion of the middle ear cavity and aditus ad antrum are highly suggestive of cholesteatoma [1, 5, 7, 8]
Exploration confirmed that the mass extended from the aditus ad antrum to the external auditory canal and involved the incudomalleolar joint; the mobility of the joint was extremely limited.
A soft, grayish, well-demarcated mass filled the mastoid antrum, mastoid tip, aditus ad antrum, and epitympanum.
Therefore, the drug likely distributes, except in rare exceptions such as a blocked aditus ad antrum.