Test 32  (Thyroid eye disease)
1. Thyroid eye disease is exacerbated by:
a. radio-iodine treatment of hyperthyroidism

b. development of hypothyroidism after treatment of 

c. smoking

d. male sex

e. presence of diabetes mellitus

2. Upper eyelid retraction in thyroid eye disease is caused by:

a. adrenergic stimulation of the Muller's muscle

b. superior oblique muscle fibrosis

c. inferior rectus fibrosis

d. fibrosis of the levator

e. fatty infiltration of the levator

3. Thyroid eye disease:

a. is seen in 40% of patients with Graves' disease

b. does not occur in Hashimoto's thyroiditis

c. is not a feature of thyroid cancer

d. tends to peak 6 months from onset

e. usually cease to be active 18 months after onset

4. The following are true about the radiological features of 
    thyroid eye disease:

a. inferior and lateral recti are the two extraocular muscles 
    most often involved

b. the tendon of the affected muscle is not involved

c. medial rectus enlargement is more likely than inferior
    rectus enlargement in causing compressive optic 

d. oedema of the extraocular muscle is best diagnosis with

e. STIR-sequence MRI is useful in assessing the activity of
    thyroid eye disease


5. The following are true about thyroid eye disease:

          a. the orbital tissue is infiltrated by B cells during 
              the active phase

b. when performing orbital decompression for 
    optic neuropathy, the medial wall should be 

c. lacrimal gland enlargement is common

d. bicoronal flap is the best approach for orbital 

e. diplopia is a common complication of orbital 

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