The resemblance of identical twins to each other in mental characteristics, dispositions, likes and dislikes is well recognized. The close resemblance of their features, such as birth marks, finger prints, sole prints and blood groups, has been studied and reported. The study of resemblances of identical twins is of great importance, as it throws some light on the inborn factors in health and in disease.
The only report of a hearing defect in identical twins with audiogram findings that I have been able to find is that of Macfarlan,1 who reported the cases of middle-aged twin sisters who were teachers. These twins were identical in every respect: They looked alike, were of the same height and weight, acted alike, thought alike and dressed alike. Their audiograms showed the same loss of hearing: The falls and rises across the pitch range were in nearly exact correspondence one with the
RODIN FH. IDENTICAL HEARING DEFECT IN IDENTICAL TWINS. Arch Otolaryngol. 1933;17(2):179–182. doi:10.1001/archotol.1933.03570050166003