Diseases of PNS
Sinusi least involved in: [DNB Dec 2011]
"Isoiated involvement of sphenoid sinus is rare. It is often a part of pansinusitis or is associated with infection of posterior ethmoidal sinus."
"The sphenoid sinus is rarely affected on its own" -Turner 10th/ed p 48 In Nutshell remember:
M/c sinus affected in adults-maxillary M/c sinus affected in children-Ethmoid Sinus which is least affected-Sphenoid