periorbital cellulitis
Infection of the soft tissues anterior to the orbital septum, presenting with eyelid swelling and erythema without affecting vision or extraocular movements.
Full Definition
Periorbital cellulitis, also known as preseptal cellulitis, is a bacterial infection of the eyelid and surrounding soft tissues that remains anterior to the orbital septum. It commonly affects young children and presents with eyelid swelling, erythema, and tenderness without affecting vision, extraocular movements, or causing proptosis. The condition is often secondary to upper respiratory infections, conjunctivitis, or minor trauma. It must be distinguished from orbital cellulitis, which is a more serious condition involving structures posterior to the orbital septum. Treatment typically involves oral antibiotics for mild cases or intravenous antibiotics for more severe presentations.
Usage
Usage note: Must be carefully distinguished from orbital cellulitis; the key differentiator is whether structures posterior to the orbital septum are involved.
In Context
- "The patient's periorbital cellulitis was managed with oral amoxicillin-clavulanate after ruling out orbital involvement." — Emergency department discharge note
- "Normal extraocular movements and visual acuity confirmed periorbital rather than orbital cellulitis." — Ophthalmology consultation