Abstract
In a group of patients with otitis media catarrhalis a search was made for the ecto-mesodermal syndrome which has primarily been demonstrated in patients with otosclerosis. In collaboration with the school dentist, attention was especially focused on the dental system, using dental caries as an indicator. The study shows that a constitutional factor in the ecto- and mesodermal organ may in some cases be responsible for the development of chronic otitis media catarrhalis.