Chronic unilateral nasal congestion

An 18 year old man was referred to the otolaryngology (head and neck surgery) department with persistent right sided nasal congestion for one year. He had used a nasal corticosteroid spray in the six months before presentation, but his symptoms had not improved. At the otolaryngology department he underwent a non-contrast computed tomography scan of his sinuses (fig 1). What is the diagnosis? Fig 1 Computed tomography scans of the sinuses (coronal planes) Antrochoanal polyps (ACPs) in the right sinonasal cavity (fig 2). Fig 2 Computed …