Most definitive diagnosis of sinusitis is: (A) X-ray PNS, (B) Proof puncture, (C) Sinuscopy, (D) Transillumination test
Answer is C. Sinuscopy or Diagnostic nasal endoscopy is the most appropriate investigation.The classical feature is the presence of mucopus in the middle meatus or above the middle meatusA more appropriate investigation would be CT scan of the nose and PNS.Ref: Hazarika; 3rd ed; Pg 331