TTC8 and retinitis pigmentosa: Furthermore, the chromosome section 14q24.3 is highly amplified in 18 Head and Neck Squamous Cell Carcinoma (HNSCC) cell lines (Järvinen et al., 2008[37]) and the TTC8 gene is responsible for the Bardet-Biedl 8 (OMIM 209900) and Retinitis pigmentosa 51 (OMIM 613464) syndrome (Supplementary data Figure 5).