Eyelid swelling and erythema as the only signs of subperiosteal abscess.

On clinical grounds it is usually easy to distinguish between preseptal cellulitis, a cutaneous infection not threatening to vision, and orbital cellulitis, a potentially vision threatening infection of the orbital tissues generally arising from paranasal sinusitis. We recently cared for two patients with a clinical diagnosis of preseptal cellulitis who had CT scan evidence of subperiosteal abscess. Antibiotic therapy alone resulted in clinical resolution in each case.