Answers:
What is the average growth rate of vestibular schwannomas?
A) 0.5 mm/yr
B) 1mm/yr
C) 1.2 mm/yr
D) 1.5 mm/yr
E) 1.8mm/yr
The average growth of VS is 1.8/yr. However, this can vary widely and a repeat scan should be performed 6 months after initial diagnoses to assess the growth pattern of each particular tumor.
Typically, how large must a CPA tumor be to cause cerebellar symptoms?
MC Questions:
Which of the following approaches to a CPA tumor is hearing ablative?
A) Retrosigmoid
B) Middle Fossa
C) Translabyrinthine
D) They can all be hearing preserving as long as care is taken not to damage vital hearing structures
E) They are all hearing ablative
A) 0.5 mm/yr
B) 1mm/yr
C) 1.2 mm/yr
D) 1.5 mm/yr
E) 1.8mm/yr
The average growth of VS is 1.8/yr. However, this can vary widely and a repeat scan should be performed 6 months after initial diagnoses to assess the growth pattern of each particular tumor.
Typically, how large must a CPA tumor be to cause cerebellar symptoms?
To cause cerebellar symptoms a VS usually has to fill the CPA which requires it to be ~ 3cm.
Which of the following approaches to a CPA tumor is hearing ablative?
A) Retrosigmoid
B) Middle Fossa
C) Translabyrinthine
D) They can all be hearing preserving as long as care is taken not to damage vital hearing structures
E) They are all hearing ablative
Free Response Question:
When is observation an adequate management strategy for vestibular schwannomas?
Quick Facts:
Vestibular Schwannomas = 80% of CPA tumors.
-Of the other 20%, most are distinguished be imaging characteristics
-CPA: Bounded be temporal bone, cerebellum and brainstem
-CPA is traversed be CN V-XI.
-90% of CPA tumors are schwannomas and meningiomas, the other 10% include congenital rest lesions, intra-axial tumors, metastases and vascular lesions and lesions from skull base.
-Classic symptoms of CPA tumors include : unilateral hearing loss, vertigo, altered facial sensation, facial pain progressing to nystagmus, facial palsy, vocal cord palsy, dysphagia, diplopia, respiratory compromise and death.
When is observation an adequate management strategy for vestibular schwannomas?
Quick Facts:
Vestibular Schwannomas = 80% of CPA tumors.
-Of the other 20%, most are distinguished be imaging characteristics
-CPA: Bounded be temporal bone, cerebellum and brainstem
-CPA is traversed be CN V-XI.
-90% of CPA tumors are schwannomas and meningiomas, the other 10% include congenital rest lesions, intra-axial tumors, metastases and vascular lesions and lesions from skull base.
-Classic symptoms of CPA tumors include : unilateral hearing loss, vertigo, altered facial sensation, facial pain progressing to nystagmus, facial palsy, vocal cord palsy, dysphagia, diplopia, respiratory compromise and death.
No comments:
Post a Comment