a history of chronic ear or nose condition ( rhinitis , sinusitis , nasal polyp , otitis media ) was another risk factor for npc ( rr = 2.2 , p less than 0.0005 ) , and 18 cases compared to 3 controls had a first-degree relative with npc ( rr = 6.0 , p = 0.001 ) .
C0028432
nose
C0027430
nasal polyp