Lect 12 optic neuropathies 3

Question 1

Which one of the following is NOT true?

a) optic nerve sheath meningioma is mostly found in female adults
b) optic nerve glioma is mostly found in children
c) Pituitary adenoma is mostly found in female adults
d) acromegaly is the enlargement of the hands due to excess growth hormone in children

Answer 1

d) acromegaly is the enlargement of the hands due to excess growth hormone in children (FALSE, acromegaly is the enlargement of the hands due to excess growth hormone in ADULTS. In children, excess growth hormone leads to gigantism.)

Question 2

The optic nerve is vulnerable to injury at many points along its anatomical course. Which one of the following is the most common site of trauma?

a) optic disc/laminar zone
b) intro-orbital zone
c) intra-canalicular zone
d) intra-cranial zone

Answer 2

c) intra-canalicular zone

Question 3

(T/F) Management of traumatic optic neuopathy is a mega dose of corticosteroids to decrease edema

Answer 3

true

Question 4

In regards to infectious optic neuropathy, you may/may not have which 4 of the following?

a) flame hemes
b) fever, lymphadenopathy
c) RAPD
d) macular edema
e) anterior uveitis

Answer 4

b) fever, lymphadenopathy
c) RAPD
d) macular edema
e) anterior uveitis

Question 5

Which one of the following is NOT true regarding “cat-scratch” disease?

a) visual symptoms start 2-3 weeks after systemic symptoms resolve
b) fundus evaluation shows mild disc edema
c) macular star present
d) has nothing to do with handling cats

Answer 5

d) has nothing to do with handling cats (FALSE, transmission is via cat scratch. Children develop febrile illness few weeks after exposure to a kitten)

Question 6

Which one of the following is a NOT sign of nutritional optic neuropathy?

a) painful
b) bilateral
c) VA ranges from 20/50-20/200
d) slowly progressive
e) cento-cecal VF defects
f) no RAPD

Answer 6

a) painful (FALSE, it is painless)

Question 7

Which one of the following is NOT true regarding Leber’s hereditary optic neuropathy (LHON)?

a) begins at ages 25-35
b) it is an X-linked disorder
c) more likely in males M:F 4-5:1
d) VF defect is central or ceco-central scotoma
e) unilateral but becomes bilateral after 2-4 weeks
f) dilation of peripapillary retinal vessels

Answer 7

b) it is an X-linked disorder (FALSE, it is a mitochondrial disorder)

Question 8

(T/F) Toxic neuropathy can be caused by ethambutol

Answer 8

true (also caused by anti-TB meds and isoniazid)

Question 9

Which one of the following is NOT true regarding autosomal dominant optic atrophy?

a) bilateral
b) vision abnormalities begin in childhood (age 4-10)
c) most rare type of inherited optic neuropathy
d) VA ranges from 20/30-20/200
e) tritan color defect

Answer 9

c) most rare type of inherited optic neuropathy (False, it is the most common type of inherited optic neuropathy)