Patients who have asymetrical disease on the two sides (Lund Mackay score difference more than 2)

Patients who have endoscopic sinus surgery for treatment of tumor or disease other than sinusitis

Patients with underlying uncontrolled hypertension

Patients with bleeding disorder or are unable to discontinue antiplatelet or anticoagulant before the surgery

Patients who are allergic to adrenaline or to xylocaine

Effects of Adrenaline Infiltration on Surgical Field of View in Endoscopic Sinus Surgery