When three AD datasets were compared, we found 3 DEGs (GATA2, CDKN1C, PARP10) are common in RA|MS|SLE, 1 gene (F5) common in RA|MS|CD, and 1 gene (ORC4) is common in RA|MS|T1D datasets. This evidence concerns the gene GATA2 and Alzheimer disease.