“…It is characterized by inflammation of the nasal mucosa and paranasal sinuses, and by definition, patients with CRS must report the presence of anterior or posterior rhinorrhea, nasal congestion, hyposmia, and/or facial pressure or pain that lasts for more than 12 weeks. 1,2 Although CRS is not life-threatening, symptoms such as nasal congestion, nasal discharge, pain or facial pressure, loss of smell, and cough impair the patient's quality of life and economic activity. 3,4 CRS is heterogeneous and is generally classified into 2 phenotypes, namely, CRS with nasal polyps (CRSwNP) and CRS without nasal polyps.…”