The current treatment of choice for a large antrochoanal polyp in a 10-year-old is:
(c) FESS(Ref. Cummings, 6th ed., 760)Antrochoanal polyp arise from the maxillary antrum and grow into the nasopharynx, hence they are always large at presentation and management is excision by FESS.
Intranasal polypectomy
Caldwell-Luc operation
FESS
Lateral rhinotomy and excision
Nasal Polyposis