- Renpenning syndrome [DOID:0060179]
An intellectual disability that is characterized by small head size (microcephaly), long narrow face, short stature, small testes, and intellectual deficit which follows X-linked inheritance and presents most often in males.
- fragile X syndrome [DOID:14261]
A syndrome that is characterized by moderate to severe mental retardation, macroorchidism, and distinct facial features, including long face, large ears, and prominent jaw, and has_material_basis_in X-linked inheritance and a loss of FMR1 function.
- syndromic X-linked intellectual disability 14 [DOID:0060821]
A syndromic X-linked intellectual disability characterized by mild to severe intellectual disability, autistic features, slender build, poor musculature, long, thin face, high-arched palate, high nasal bridge, and pectus deformities that has_material_basis_in mutation in the UPF3B gene on chromosome Xq24.
- syndromic X-linked intellectual disability Siderius type [DOID:0060812]
A syndromic X-linked intellectual disability characterized by mild to moderate intellectual disability, long face and a broad nasal tip with in some cases cleft lip/palate, preaxial polydactyly and cryptorchidism that has_material_basis_in mutation in the PHF8 gene on chromosome Xp11.22.