Welcome to your 🧠 Proptosis, Orbital Disorders & Neuro-Ophthalmic Mimics Arena — 40 Integrated MCQs
1.
A child develops rapidly progressive unilateral proptosis over a short period without a history of trauma. Which orbital malignancy should be considered?
2.
A 46-year-old patient with generalized myasthenia gravis is found to have a thymoma on chest imaging. Which treatment principle is specifically indicated by this associated finding?
3.
A patient has fluctuating weakness strongly suggestive of myasthenia gravis, but initial antibody testing is inconclusive. Which investigation can directly demonstrate abnormal neuromuscular transmission?
4.
A 38-year-old man is newly diagnosed with generalized myasthenia gravis. In addition to confirming impaired neuromuscular transmission, his physician requests imaging of the chest. What is the main purpose of this investigation?
5.
A patient reports persistent loss of vision in one eye and believes it is due to migraine. Which feature makes uncomplicated migraine aura less likely?
6.
A 61-year-old woman with longstanding proptosis develops severe foreign-body sensation. Examination shows incomplete eyelid closure and inferior corneal epithelial damage. Which management principle should receive immediate attention?
7.
A patient with unilateral proptosis undergoes serial examinations. The ophthalmologist wants an objective method to document change in anterior globe position over time. Which assessment is most suitable?
8.
Which modifiable factor is associated with increased severity of thyroid eye disease?
9.
A patient with thyroid eye disease has mild proptosis and ocular-surface discomfort but no evidence of optic nerve dysfunction. Which treatment principle is most appropriate at this stage?
10.
The visual symptoms of a typical migraine aura are most directly related to transient dysfunction of which structure?
11.
A patient has pulsatile proptosis, conjunctival vascular congestion and an orbital bruit. Which diagnosis is most likely?
12.
Which clinical feature in a patient with proptosis most strongly suggests possible optic nerve compromise?
13.
Which bedside test may temporarily improve ptosis in ocular myasthenia gravis?
14.
A 45-year-old woman has bilateral prominent eyes, upper-lid retraction and diplopia. Which underlying disorder is most likely?
15.
A patient presents with sudden painful proptosis following orbital trauma. Vision is rapidly decreasing. Which condition is most likely?
16.
A woman with thyroid eye disease has diplopia on attempted gaze. The ophthalmologist explains that her eye-movement abnormality differs from a cranial nerve palsy because the enlarged muscles are mechanically limiting movement. What is the best description of this abnormality?
17.
A 24-year-old woman experiences gradually spreading zig-zag lights followed by a transient area of visual loss. The symptoms resolve completely. Which diagnosis is most likely?
18.
A 23-year-old medical student describes a visual disturbance that begins as a small shimmering area and gradually expands across the right half of her vision. Covering either eye does not eliminate the affected side. The disturbance resolves before a typical headache begins. Where is the visual disturbance most likely arising?
19.
A patient with known myasthenia gravis develops severe dysphagia and respiratory muscle weakness. Which clinical situation should be suspected?
20.
Which orbital imaging finding is most characteristic of thyroid eye disease?
21.
A 40-year-old woman with suspected thyroid eye disease undergoes orbital CT. The radiologist wants to distinguish the pattern from some other inflammatory orbital disorders. Which additional imaging feature would support thyroid-associated orbitopathy?
22.
A patient with thyroid eye disease develops worsening visual acuity and impaired colour vision. Which complication should be suspected?
23.
A 52-year-old patient previously treated for thyroid eye disease has had unchanged proptosis and stable diplopia for more than a year. There is no pain, redness or progressive swelling. Which management approach is most appropriate for persistent functionally significant deformity?
24.
A 42-year-old woman develops slowly progressive prominence of her right eye. Examination shows that the globe is displaced downward and medially rather than directly forwards. Visual acuity is preserved. Which interpretation is most appropriate?
25.
A 9-year-old child presents with fever, painful eyelid swelling, proptosis and restricted ocular movements. Which diagnosis is most likely?
26.
A 47-year-old woman with thyroid-associated orbitopathy reports orbital discomfort and recent worsening of swelling. Examination shows conjunctival injection, chemosis and progressive periocular inflammation. Which description best characterizes the current phase of her disease?
27.
A 29-year-old woman with variable ocular misalignment is being evaluated for possible myasthenia gravis. Her extraocular weakness does not correspond consistently to any single ocular motor nerve. Which additional finding would most strongly support a neuromuscular-junction disorder rather than a third-nerve lesion?
28.
A patient with suspected ocular myasthenia is asked to look down for several seconds and then rapidly return to primary gaze. The upper eyelid briefly overshoots before settling. Which clinical sign has been demonstrated?
29.
Which investigation is most useful for assessing the optic nerve, orbital apex and soft tissues in a patient with proptosis?
30.
A 44-year-old man with a previous history of migraine presents with a new headache pattern associated with persistent weakness of one arm. He assumes this is another routine migraine attack. Which approach is most appropriate?
31.
A 34-year-old woman presents with intermittent diplopia. Examination in the morning is almost normal, but after sustained upward gaze one upper eyelid gradually droops. Which physiological feature of the underlying disorder best explains this change?
32.
A 55-year-old man has gradual, painless unilateral proptosis for six months. There is no fever or orbital congestion, but a deep orbital mass is suspected. Which investigation is most appropriate as an initial anatomical assessment of the orbit and adjacent bony structures?
33.
Which drug improves muscle strength in myasthenia gravis by increasing acetylcholine availability at the neuromuscular junction?
34.
A 28-year-old highly myopic man is referred for suspected unilateral proptosis. Ocular movements, pupils and orbital imaging are normal. The apparently prominent eye has a markedly increased axial length. Which explanation best accounts for his appearance?
35.
A 35-year-old patient presents with forward displacement of one eye. The globe is displaced directly forwards without deviation. Which location of an orbital lesion is most consistent with this finding?
36.
A 25-year-old woman with recurrent migraine develops a familiar gradually evolving visual disturbance followed by unilateral pulsating headache, nausea and photophobia. Neurological examination between attacks is normal. Which management approach is most appropriate for an uncomplicated acute attack?
37.
The muscle weakness in myasthenia gravis most commonly results from antibodies directed against which structure?
38.
A 31-year-old woman experiences recurrent disabling migraine attacks despite appropriate treatment of individual episodes. The attacks significantly interfere with her work. Which longer-term management principle should now be considered?
39.
A 30-year-old woman develops fluctuating ptosis and diplopia that become worse by evening and improve after rest. Her pupils are normal. Which diagnosis is most likely?
40.
A patient with thyroid eye disease has difficulty looking upwards. Which extraocular muscle is most likely restricting elevation?
