School ager with obstructive sleep apnea

MRI of antrochoanal polyp
Axial (left), coronal (middle), and sagittal T1 MRI with contrast of the paranasal sinuses show a left-sided polyp extending from the left maxillary sinus (center), to the nasal cavity (left), to the nasopharynx and ultimately to the oropharynx and abutting the epiglottis (right).

The diagnosis was antrochoanal polyp.