| Disease ID | Source | Name | Description |
| 618221 | OMIM | Mental retardation, autosomal recessive 66 (MRT66) | A form of mental retardation, a disorder characterized by significantly below average general intellectual functioning associated with impairments in adaptive behavior and manifested during the developmental period. MRT66 patients have intellectual disability, delayed speech development, neuropsychiatric symptoms, and relatively normal life span. The disease is caused by variants affecting the gene represented in this entry. |