The following conditions are associated with orbital cellulitis: 
Chronic sinusitis Upper respiratory tract infection Subperiosteal abscess
What is the underlying cause or mechanism of orbital cellulitis?
<s>[INST] Answer the question truthfully, you are a medical professional. This is the question: What is the underlying cause or mechanism of orbital cellulitis? [/INST] \n The following conditions are associated with orbital cellulitis: 
Chronic sinusitis Upper respiratory tract infection Subperiosteal abscess</s>