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Diseases of The Middle Ear

Question
50 out of 92
 

Most common extra-cranial complication of ASOM is:



A Facial nerve paralysis
B Lateral sinus thrombosis

C Sub periosteal abscess
D Brain abscess

Ans. C Subperiosteal abscess

As discussed earlier therelative incidence of various extracranial complications in a case of chronic, otitis media are:

Extracranial complication

Percentage

Post auricular abscess:

Fpcial palsy

Bezold abscess

Petrous apicitis (Petrositis)

Meningitis

75

6

2

0.2

12

So M/C complication is post auricular abscess

Now what is post auricular abscess

There are many abscesses in relation to mastoid -

Post aural subperiosteal abscess

Zygomatic abscess

Bezold abscess

It is the commonest abscess that

forms over the mastoid

Pinna is displaced forward, out ward

and downward In infants and chiidren

abscess forms over

McEwan's triangle

Posterior root of zygoma is invoved

Swelling lies in front of and above the

pinna

Associated oedema of upper eye lid

Pus lies superficial or deep to

temporalis muscle.

Passes throughthe tip of mastoid into

sterno cleido mastoid muscle in the

upper part of neck.?

Citelli abscess

Lucs abscess (Meatal abscess)

Pus passes through inner-table of

mastoid process into the dfgastric

triangle?

ln-thiscase, pus breaks throughthe

bony wall between the antrum and

external osseus meatus. Swelling is.

seen in deep part of rneatus.?

lateral sinus thrombosis

So As is clear from above explanation - M/C. Extra cranial complication is - Post Aural sub periosteal abscess: If this option

is not given then the next best option would be Mastoiditis.

Diseases of The Middle Ear Flashcard List

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