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Tumours of Cerebellopontine Angle

Question
13 out of 18
 

Vestibular neuroma not correct: (LQ)



A Nystagmus

B High frequency sensorineural deafness

C Absence of caloric response

D Normal corneal reflex

Ans. D Normal corneal reflex

As far as the answer is concerned - I am sure no one has any doubts about it because corneal reflex is absent in acoustic neuroma But lets focus on option c. Absence of caloric response -

In acoustic neuroma -

Caloric test will show diminished or absent response in 96% patients due to vestibular involvement.

Hence option c. correct

Also Know

Criteria of suspicion for Acoustic neuroma

a. Unilateral deafness of less than 10 years.

b. Sudden deafness with retrocochlear involvement which does not respond to steroids

c. Poor speech discrimination score in relation to pure tone threshold

d. Spontaneous nystagmus with eyes closed on electronystagmography without a history of disequilibrium

e. Absence of caloric response in case of normal hearing

f. Hearing loss with reduced corneal reflex

g. Local pain

Note

If hearing loss is the only symptom and it is of more than 10 years duration, an acoustic neuroma is most unlikely as a tumor which has been growing for longer than this period because it will give features of other cranial nerve or brainstem involvement also.

Tumours of Cerebellopontine Angle Flashcard List

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