• DOI:10.1001/ARCHOTOL.125.9.969
• Corpus ID: 7000061

Prevalence of external auditory canal exostoses in surfers.

@article{Wong1999PrevalenceOE,
  title={Prevalence of external auditory canal exostoses in surfers.},
  author={Brian Jet-Fei Wong and Wilson. Cervantes and Karen Jo Doyle and Amir M. Karamzadeh and P Boys and George Brauel and Enas Mushtaq},
  journal={Archives of otolaryngology--head \& neck surgery},
  year={1999},
  volume={125 9},
  pages={
          969-72
        }
}

• B. Wong, W. Cervantes, +4 authors E. Mushtaq
• Published 1 September 1999
• Medicine
• Archives of otolaryngology--head & neck surgery

OBJECTIVE
To determine (1) the prevalence of external auditory exostoses in a population of surfers and (2) the relationship between the length of time spent surfing and the prevalence, severity, and location of the exostoses.

DESIGN
Cross-sectional epidemiological study.

SETTING
General community.

PATIENTS
Three hundred seven avid surfers (93.5% males and 6.5% females; age distributions: 11.2% were < or =20, 67.9% were 21 to 40, 17.5% were 41 to 50, and 3.3% were >50 years).

MAIN OUTCOME MEASURES
Questionnaires focusing on surfing habits (number of years, geographic region, and number of days per year of surfing) were correlated with otoscopic findings. A simple grading system was devised, based on the degree of external auditory canal stenosis. Grades of normal, mild, moderate, and severe corresponded to 100%, 99% to 66%, 65% to 33%, and less than 33% effective patent surface area, respectively.

RESULTS
There was a 73.5% overall prevalence of external auditory exostoses and a 19.2% overall prevalence of osteomas in the group studied. Of 441 ears with exostoses, 54.2% were mild, 23.6% were moderate, and 22.2% were severe. Of individuals who had surfed for 10 years or less, 44.7% had normal ear canals and only 6% had severely obstructed auditory canals. In comparison, in the group that had surfed for longer than 20 years, only 9.1% had normal auditory canals and 16.2% were severely affected. Of surfers with no exostoses, 61.1% had surfed for 10 years or less. In contrast, of surfers with severe exostoses, 82.4% had surfed for more than 10 years. Finally, the lesions seemed to affect all external auditory canal quadrants equally.

CONCLUSION
A positive association exists between the amount of time individuals spend surfing and the presence and severity of exostoses of the external auditory canal.