Alzheimer Disease 9, also known as ad9, is related to alzheimer disease 19 and esophagus carcinoma in situ. An important gene associated with Alzheimer Disease 9 is ABCA7 (ATP Binding Cassette Subfamily A Member 7), and among its related pathways/superpathways are Alzheimer's disease and miRNA effects and Reelin Pathway (Cajal-Retzius cells). Affiliated tissues include brain and cerebellum, and related phenotypes are abnormality of extrapyramidal motor function and depression