| Disease ID | Source | Name | Description |
| 615750 | OMIM | Moyamoya disease 6 with or without achalasia (MYMY6) | A form of Moyamoya disease, a progressive cerebral angiopathy characterized by bilateral intracranial carotid artery stenosis and telangiectatic vessels in the region of the basal ganglia. The abnormal vessels resemble a 'puff of smoke' (moyamoya) on cerebral angiogram. Affected individuals can develop transient ischemic attacks and/or cerebral infarction, and rupture of the collateral vessels can cause intracranial hemorrhage. Hemiplegia of sudden onset and epileptic seizures constitute the prevailing presentation in childhood, while subarachnoid bleeding occurs more frequently in adults. MYMY6 is characterized by severe cerebral angiopathy and onset of severe achalasia in infancy or early childhood. The disease is caused by variants affecting the gene represented in this entry. |