The document discusses the involvement of acute sinusitis in orbital conditions, emphasizing the significance of free vascular communication between the orbit and sinuses. It details the various factors such as orbital fractures, mucoceles, and infections that may lead to orbital cellulitis, along with imaging techniques for diagnosis and treatment planning. Furthermore, it highlights the effectiveness of gadolinium contrast enhancement in evaluating conditions like cavernous sinus thrombosis.

1. DR. ANKIT M. PUNJABI (DOMS) DR. MRINMAYEE GHATAK (DOMS) Dept. of Ophthalmology, KIMS Hospital, Bangalore Karnataka, INDIA Email: drankitalways@gmail.com

9. 0.5 to 3 % - acute sinusitis- orbital involvement Free vascular communication – orbit & sinuses Thin bone, neurovascular passage, naturally occurring defects in the bone Communication of infectious material – ethmoidal air cells & subperiorbital space Orbital fractures Mucoceles- mucus filled cysts- pressure erosion- infected- mucopyoceles- cellulitis

11. Endogenous causes Exogenous causes Extend extraocularly to involve orbit

28. With Gadolinium contrast enhancement orbital cellulitis – smearing or linear streaking of normal fat shadows, on T2 weighted images Superior to CT in Cavernous Sinus Thrombosis Help in planning of surgery & evaluation of therapy