Moyamoya Disease 5, also known as mymy5, is related to moyamoya disease 1 and aortic aneurysm, familial thoracic 6. An important gene associated with Moyamoya Disease 5 is ACTA2 (Actin Alpha 2, Smooth Muscle). Affiliated tissues include smooth muscle and brain, and related phenotypes are moyamoya phenomenon and ascending tubular aorta aneurysm