Treatment of Periorbital Cellulitis

Antibiotic Selection

The American Academy of Pediatrics recommends oral antibiotics active against streptococci for uncomplicated periorbital cellulitis, with amoxicillin-clavulanate as the first choice for comprehensive coverage 1, 2
For penicillin-allergic patients, clindamycin is recommended 1, 3
For severe cases, parenteral antibiotics such as first-generation cephalosporin (cefazolin) or penicillinase-resistant penicillin (nafcillin or oxacillin) are indicated 1, 4, 5

The Infectious Diseases Society of America recommends a treatment duration of 5 days, with extension if the infection has not improved within this period 1, 4

Hospitalization is recommended for patients with systemic inflammatory response syndrome (SIRS), altered mental status, or hemodynamic instability 1, 4, 6, 3

Blood cultures are generally not necessary for typical cases but should be considered in patients with malignancy, severe systemic features, or unusual predisposing factors 1

Elevation of the affected area to promote gravity drainage of edema is recommended 5, 4
Systemic corticosteroids could be considered in non-diabetic adult patients to reduce inflammation and hasten resolution 5, 3

MRSA coverage should be considered in cases associated with penetrating trauma, evidence of MRSA infection elsewhere, purulent drainage, or history of injection drug use 1, 4, 3

Identifying and treating predisposing conditions such as sinusitis is recommended 6
For patients with frequent episodes, consider prophylactic antibiotics such as oral penicillin or erythromycin 1, 3

Don't automatically add MRSA coverage for typical non-purulent periorbital cellulitis without specific risk factors 4, 3
Don't extend treatment unnecessarily beyond 5 days if clinical improvement has occurred 1, 3

The American College of Radiology recommends obtaining CT orbits with IV contrast as the initial imaging modality to differentiate preseptal from postseptal cellulitis and identify complications requiring surgical intervention 7
CT orbits with IV contrast differentiates preseptal from postseptal cellulitis and identifies subperiosteal or intra-orbital abscesses, with a high degree of accuracy 7
The American College of Radiology suggests that precontrast imaging is typically unnecessary as it adds no significant diagnostic information 7
Identifies complications including superior ophthalmic vein thrombosis, cavernous sinus thrombosis, or subdural empyema 7

MRI orbits and brain with and without IV contrast should be obtained if intracranial complications are suspected, based on altered mental status, severe headache, or CT findings suggesting intracranial extension 7
MRI provides superior soft-tissue resolution for assessing cavernous sinus involvement, according to the American College of Radiology 8
Consider MRI in immunocompromised patients where invasive fungal infection is a concern, as these infections carry high morbidity 8
Blood cultures should NOT be obtained routinely in typical periorbital cellulitis cases, as they are positive in only 0-1% of preseptal cellulitis cases 9

Admit to hospital if there are any signs of postseptal involvement, such as proptosis, ophthalmoplegia, pain with eye movement, or visual impairment 7
Do not assume bilateral periorbital swelling is always cellulitis—consider venous congestion from cavernous sinus thrombosis, which requires immediate vascular imaging, as suggested by the American College of Radiology 8
Do not obtain blood cultures routinely, as they are positive in <1% of preseptal cases and do not change management 9