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:

(d) Allergic fungal sinusitis(Ref. Cummings, 6th ed., 736)The NCCT shows haziness of the left maxillary sinus and mass in the left nasal cavity without any bony erosion.Fungal sinusitis presents as U/L nasal mass (ployp) with mucinous discharge in adults. Antrochoanal polyp is seen in young as U/L nasal mass, patient presents here mainly with nasal obstruction, discharge if at all present is purulent and not mucinous. Ethmoidal polyps are B/L. Maxillary carcinoma is U/L nasal mass, presenting with blood tinged nasal discharge, CT here shows bony erosion.