Board Certified Ophthalmologist Oculoplastics and Orbital Disease 1

Question 1

Which of the following is the most common primary malignant orbital tumor in adults?

Accepted Answer

Lymphoma

Answer

Orbital lymphoma (most often B-cell non-Hodgkin) is the most common primary malignant orbital tumor in adults.

Question 2

A child presents with proptosis, erythema, and restricted ocular motility following a sinus infection. CT shows subperiosteal abscess. What is the most appropriate next step?

Accepted Answer

IV antibiotics and surgical drainage

Answer

A subperiosteal abscess (Chandler stage IV orbital cellulitis) requires prompt IV antibiotics and surgical drainage to prevent vision loss and intracranial spread.

Question 3

Which muscle is most commonly entrapped in a blowout fracture of the orbital floor?

Accepted Answer

Inferior rectus

Answer

The inferior rectus muscle and its surrounding connective tissue are most commonly entrapped in orbital floor blowout fractures, causing restricted upgaze.

Question 4

What is the hallmark finding on CT that distinguishes thyroid eye disease (Graves' orbitopathy) from orbital lymphoma?

Accepted Answer

Fusiform enlargement of extraocular muscles sparing the tendons

Answer

Thyroid eye disease characteristically causes fusiform enlargement of extraocular muscle bellies while sparing the tendons, unlike most other orbital masses.

Question 5

A patient presents with a painless, slowly progressive unilateral proptosis. MRI shows a well-circumscribed intraconal mass with homogeneous enhancement. What is the most likely diagnosis?

Accepted Answer

Cavernous hemangioma (cavernous venous malformation)

Answer

Cavernous hemangioma (cavernous venous malformation) is the most common benign orbital tumor in adults and presents as a well-circumscribed intraconal mass with homogeneous enhancement.

Board Certified Ophthalmologist Practice Test

Board Certified Ophthalmologist Practice Test

Board Certified Ophthalmologist Oculoplastics and Orbital Disease 1