orbital cellulitis is complication of:
Orbital cellulitis can occur as a complication of sinusitis and injuries.As far as endoscopic sinus surgery is concerned,it can lead to orbital and intracranial complications so orbital cellulitis can occurvin it also. Ref Scott Brown 7/e,Vol 2,p 1485.
para sinusitis
Faciomaxillary trauma
Endoscopic sinus surgery
All of these
Nose and paranasal sinuses