Consistent with its high structural homology with membrane coat components revealed by bioinformatic analyses [52] and its localization in cytoplasmic vesicular compartments in non-ciliated cells, such as T cells [53], secondary retinal neurons [54], keratinocytes [55] or breast cancer cells [56], IFT20 has been involved in extraciliary processes that rely on vesicular trafficking. This evidence concerns the gene IFT20 and breast cancer.