COL11A1: ID8 has hearing loss, left-sided SSCD, and heterozygous missense variants in two genes known for AD nonsyndromic hearing loss, namely COL11A1 (MIM 120280; 1p21.1) and TECTA (MIM 602574; 11q23.3) (Table 1 and Table 2; Figure 1). The gene discussed is COL11A1; the disease is Alzheimer disease.