A 5-year-old girl sustains a cut on her face from broken glass. Initially, the injury appears superficial except for a small area of deeper penetration just above the right eyebrow. Within 4 days, the child develops periorbital pain and double vision. The tissues about the eye are erythematous, and the eye appears to bulge slightly. The optic disc is sharp, and no afferent pupillary defect is apparent. Visual acuity in the affected eye is preserved. Which of the following is the most likely diagnosis?

a. Orbital cellulitis

b. Cavernous sinus thrombosis

c. Transverse sinus thrombosis

d. Optic neuritis

e. Diphtheritic polyneuropathy

the answer is below…

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