Table 2.

Incidence (%) of anatomical variations in the nose and paranasal sinuses

Normal anatomical variation	Unilateral		Bilateral	Total Positive	Total Negative
	Right	Left
Septal deviation	55	51	11	95	5
Spur formation	32	24	3	53	47
Concha bullosa	22	17	12	27	73
Paradoxical middle concha	6	9	0	15	85
Agger nasi cell	42	40	40	44	56
Haller cell	10	6	3	13	87
Onodi cell	27	13	11	29	71