Which of the following statements regarding the complications of bacterial orbital cellulitisis NOT correct?
A. The complications of orbital cellulitis include ocular and intracranial problems, and subperiosteal abscess.
B. For ocular complications we may find exposed corneal ulcers, raised IOP, occlusion of retinal artery or vein, endophthalmitis and optic neuropathy.
C. Subperiosteal abscess is most frequently located along the lateral orbital wall.
D. Intracranial complications, which are rare but extremely serious, include meningitis, brain abscess and cavernous sinus thrombosis.
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Which of the following statements regarding the investigations of bacterial orbital cellulitis is NOT correct?
A. Orbital CT can show preseptal and orbital opacification, which indicates the protruding eyeball, the swollen orbital soft tissue, and the blurred orbital outline.
Blood test shows increased WBC, mainly lymphocytes
C. A diffusion-weighted MRI shows high intensity in the cavernous sinus.
D. Ultrasound examination shows enhanced echo and thickened extraocular muscle.
Which of the following statements regarding the symptoms and signs of bacterial orbital cellulitis is NOT correct?
A. there may be widening of palpebral fissure, eyelids retraction, and von Graefe’s sign in some cases
B. patients usually present with rapid onset of malaise, fever and pain
C. unilateral tender warm and red periorbital and lid edema
D. the bulbar conjunctiva isseverelyedematousand protruding in some cases
Which of the following statements about bacterial orbital cellulitis is NOT correct？
A. Bacterial orbital cellulitis is a life-threatening infection of the soft tissues behind the orbital septum
B. It can occur at any age but is more common in middle-aged men
C. The most common causative organisms are S. pneumoniae, S. aureus, S. pyogenes and H. influenzae
D. None of the above
Which of the following statements regarding the pathogenesis of bacterial orbital cellulitis is correct?
A. sinus-related, most commonly ethmoidal, typically affects children
B. extension of the preseptal cellulitis through the orbital septum
C. local spread from adjacent dacryocystitis, mid-facial or dental infection
D. all of above
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