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作者观察了美国达科他州南、北部984座印第安人墓地挖掘出来的1,613个颞骨。在35个颅骨的54个颞骨上发现有外耳道外生骨疣,占总数3.3％。其中19例为双侧性。在6个颅骨的10个颞骨上发现外生骨疣呈多发性。一侧性外生骨疣16例,其中1例发生于外耳道前壁,14例发生于外耳道后壁;1例外耳道前后壁均有。发生于右耳4例,左耳12例。20岁以下之颅骨均未发现外生骨疣,有外耳道外生骨疣之年龄如下:21—30岁14例;31—40岁12例;40岁以上9例。一侧性外生骨疣21—30岁9例(9/14);31—40岁5例(5/12);41岁以上2例(2/9)。这提示两侧性外耳道外生骨疣随着年龄而增多。
The authors looked at 1,613 temporal bones excavated from 984 Indian cemetery sites in the north and south of Dakota. External skull exostoses were found on 54 temporal bones of 35 skulls, accounting for 3.3% of the total. 19 cases were bilateral. Exostosis was found on 10 temporal bones of 6 skulls. One case of exostosis occurred in 16 cases, of which 1 occurred in the anterior external auditory canal and 14 in the posterior wall of the external auditory canal. Occurred in the right ear in 4 cases, left ear in 12 cases. Exoskeletons were found in the skulls under the age of 20 years. The age of exo-genital warts was as follows: 14 cases 21-30 years old, 12 cases 31-40 years old and 9 cases over 40 years old. There were 9 cases (9/14) in 21-30 years of age; 5 cases (31/12) in 5 cases (5/12); two cases (2/9) in 41 years old. This suggests that both lateral external auditory meatus exostoses increase with age.