<prompt> A 45-year-old male with history of nasal blockade for 6 months. On examination, the patient had a nasal mass with mucin discharge. What is the probable diagnosis based on the CT scan:Antrochoanal polypEthmoidal polypMaxillary carcinomaAllergic fungal sinusitis  <response>: d Allergic fungal sinusitisRef. Cummings, 6th ed., 736The NCCT shows haziness of the left maxillary sinus and mass in the left nasal cavity without any bony erosion.Fungal sinusitis presents as UL nasal mass ployp with mucinous discharge in adults. Antrochoanal polyp is seen in young as UL nasal mass, patient presents here mainly with nasal obstruction, discharge if at all present is purulent and not mucinous. Ethmoidal polyps are BL. Maxillary carcinoma is UL nasal mass, presenting with blood tinged nasal discharge, CT here shows bony erosion. 