Mitochondrial mutations causing hearing impairment (HI) are rising in frequency, particularly the m.1555A > G mutation linked to non-syndromic deafness and aminoglycoside-induced HI.
A study of 337 subjects from 54 Syrian families revealed the m.1555A > G mutation in only 1.85% of families and 4.5% of hereditary deafness patients.
The findings highlight the mutation's diagnostic importance in Syrian populations and suggest testing before aminoglycoside treatment for at-risk individuals.