Spinocerebellar ataxia type 29- MedGen UID:
- 350085
- •Concept ID:
- C1861732
- •
- Disease or Syndrome
Spinocerebellar ataxia-29 (SCA29) is an autosomal dominant neurologic disorder characterized by onset in infancy of delayed motor development and mild cognitive delay. Affected individuals develop a very slowly progressive or nonprogressive gait and limb ataxia associated with cerebellar atrophy on brain imaging. Additional variable features include nystagmus, dysarthria, and tremor (summary by Huang et al., 2012).
For a general discussion of autosomal dominant spinocerebellar ataxia, see SCA1 (164400).
Cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 3- MedGen UID:
- 442496
- •Concept ID:
- C2750509
- •
- Disease or Syndrome
Autosomal recessive spinocerebellar ataxia-34 (SCAR34) is characterized by the onset of slowly progressive cerebellar ataxia in infancy or early childhood. Affected individuals show motor delay with delayed walking (around 5 to 6 years), unsteady wide-based gait, dysarthria, dysmetria, nystagmus, abnormal smooth pursuit, intention tremor, and dysdiadochokinesia. Some patients may also have hypotonia, spasticity, or other movement abnormalities. Almost all patients have impaired intellectual development with speech delay, although the severity is highly variable. Brain imaging shows cerebellar atrophy (summary by Kaiyrzhanov et al., 2024).
For a discussion of genetic heterogeneity of CAMRQ, see CAMRQ1 (224050).
Cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 4- MedGen UID:
- 815307
- •Concept ID:
- C3808977
- •
- Disease or Syndrome
Cerebellar ataxia, impaired intellectual development, and dysequilibrium syndrome (CAMRQ) is a genetically heterogeneous disorder characterized by congenital cerebellar ataxia and impaired intellectual development (summary by Gulsuner et al., 2011).
For a discussion of genetic heterogeneity of CAMRQ, see CAMRQ1 (224050).
Cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 1- MedGen UID:
- 1639436
- •Concept ID:
- C4551552
- •
- Disease or Syndrome
VLDLR cerebellar hypoplasia (VLDLR-CH) is characterized by non-progressive congenital ataxia that is predominantly truncal and results in delayed ambulation, moderate-to-profound intellectual disability, dysarthria, strabismus, and seizures. Children either learn to walk very late (often after age 6 years) or never achieve independent ambulation. Brain MRI findings include hypoplasia of the inferior portion of the cerebellar vermis and hemispheres, simplified gyration of the cerebral hemispheres, and small brain stem – particularly the pons.