Most definitive diagnosis of sinusitis is by
X- ray PNS
Proof puncture
Sinuscopy
Transillumination test
Sinuscopy is a method of Endoscopic sinus observation or surgery using Nose telescope. It involves the evaluation of nasal and sinus passages using the endoscope called Sinuscope. The Sinuscope has a narrow tube with a built-in camera so that the physician can see the internal details of the sinuses. By observing the sinus, it is possible to diagnose the problems and treat properly.
Nose and paranasal sinuses