| Disease ID | Source | Name | Description |
| 301043 | OMIM | Holoprosencephaly 13, X-linked (HPE13) | An X-linked form of holoprosencephaly, a structural anomaly of the brain in which the developing forebrain fails to correctly separate into right and left hemispheres. Holoprosencephaly is genetically heterogeneous and associated with several distinct facies and phenotypic variability. HPE13 features range from full alobar holoprosencephaly with cyclopia to semilobar holoprosencephaly or septooptic dysplasia. Dysmorphic features include microcephaly, hypotelorism, low-set ears, micrognathia, and cleft lip/palate. Patients with a more severe phenotype may die in the newborn period, whereas those with a less severe phenotype show global developmental delay. The disease is caused by variants affecting the gene represented in this entry. |
| 301022 | OMIM | Mullegama-Klein-Martinez syndrome (MKMS) | An X-linked neurodevelopmental disorder with variable features including intellectual deficiency, microcephaly, microtia, hearing loss, developmental delay, dysmorphic features, language delay, congenital heart defect, and clinodactyly of the 5th finger. The disease is caused by variants affecting the gene represented in this entry. |