Ataxia, and Hyporeflexia

Autosomal recessive cerebellar ataxia-epilepsy-intellectual disability syndrome due to RUBCN deficiency is an extremely rare, autosomal recessive, hereditary cerebellar ataxia disorder characterized by early onset of progressive, mild to moderate gait and limb ataxia, moderate to severe dysarthria, and nystagmus or saccadic pursuit, frequently associated with epilepsy, moderate intellectual disability, delayed speech acquisition, and hyporeflexia in the upper extremities. Hyperreflexia in the lower extremities may also be associated.

AUTOSOMAL RECESSIVE CEREBELLAR ATAXIA-EPILEPSY-INTELLECTUAL DISABILITY SYNDROME DUE TO RUBCN DEFICIENCY Is also known as autosomal recessive spinocerebellar ataxia type 15|scar15|salih ataxia

• Intellectual disability
• Seizures
• Ataxia
• Nystagmus
• Delayed speech and language development

SOURCES: ORPHANET OMIM MENDELIAN

AOA3 is an autosomal recessive progressive neurologic disorder with onset in the second decade of life (Al Tassan et al., 2012).For a discussion of genetic heterogeneity of ataxia-oculomotor apraxia, see AOA1 (OMIM ).

• Ataxia
• Nystagmus
• Muscle weakness
• Dysarthria
• Cerebellar atrophy

SOURCES: OMIM MENDELIAN

Charcot-Marie-Tooth disease type 2T (CMT2T) is a slowly progressive autosomal recessive sensorimotor peripheral neuropathy with onset in middle age (Higuchi et al., 2016).For a phenotypic description and a discussion of genetic heterogeneity of axonal CMT, see CMT2A1 (OMIM ).

DNAJB2-RELATED CHARCOT-MARIE-TOOTH DISEASE TYPE 2 Is also known as charcot-marie-tooth neuropathy, type 2t|charcot-marie-tooth disease, axonal, autosomal recessive, type 2t|dnajb2-related cmt2

• Ataxia
• Cognitive impairment
• Peripheral neuropathy
• Gait disturbance
• Cerebral atrophy

SOURCES: OMIM ORPHANET MENDELIAN

Spinocerebellar ataxia type 4 (SCA4) is a very rare progressive and untreatable subtype of type I autosomal dominant cerebellar ataxia (ADCA type I; see this term) characterized by ataxia with sensory neuropathy.

SPINOCEREBELLAR ATAXIA TYPE 4 Is also known as spinocerebellar ataxia, autosomal dominant, with sensory axonal neuropathy|sca4

• Ataxia
• Muscle weakness
• Peripheral neuropathy
• Dysarthria
• Gait disturbance

SOURCES: OMIM ORPHANET MENDELIAN

Spinocerebellar ataxia type 14 (SCA14) is a rare mild subtype of type I autosomal dominant cerebellar ataxia (ADCA type I; see this term). It is characterized by slowly progressive ataxia, dysarthria and nystagmus.

SPINOCEREBELLAR ATAXIA TYPE 14 Is also known as sca14

• Generalized hypotonia
• Cognitive impairment
• Dysarthria
• Tremor
• Myoclonus

SOURCES: ORPHANET MENDELIAN

ATAXIA, SENSORY, 1, AUTOSOMAL DOMINANT; SNAX1 Is also known as adsa

• Ataxia
• Dysarthria
• Gait disturbance
• Dysphagia
• Congestive heart failure

SOURCES: OMIM MENDELIAN

The Jokela type of spinal muscular atrophy (SMAJ) is an autosomal dominant lower motor neuron disorder characterized by adult-onset of muscle cramps and fasciculations affecting the proximal and distal muscles of the upper and lower limbs. The disorder is slowly progressive, resulting in weakness and mild muscle atrophy later in life (summary by Jokela et al., 2011).

• Ataxia
• Muscle weakness
• Skeletal muscle atrophy
• Tremor
• Gait disturbance

SOURCES: ORPHANET OMIM MENDELIAN

Autosomal recessive mental retardation-53 is a neurodevelopmental disorder characterized by severely delayed psychomotor development, hypotonia apparent since infancy, and early-onset seizures in most patients. Some patients may have additional features, such as cerebellar hypoplasia and ataxia. MRT53 is one of a group of similar neurologic disorders resulting from biochemical defects in the glycosylphosphatidylinositol (GPI) biosynthetic pathway (summary by Makrythanasis et al., 2016).For a discussion of genetic heterogeneity of GPI biosynthesis defects, see GPIBD1 (OMIM ).

MENTAL RETARDATION, AUTOSOMAL RECESSIVE 53; MRT53 Is also known as glycosylphosphatidylinositol biosynthesis defect 13|gpibd13

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Ataxia

SOURCES: OMIM MENDELIAN

Spinocerebellar ataxia type 21 (SCA21) is a very rare subtype of type I autosomal dominant cerebellar ataxia (ADCA type I; see this term). It is characterized by slowly progressive cerebellar ataxia, mild cognitive impairment, postural and/or resting tremor, bradykinesia, and rigidity.

SPINOCEREBELLAR ATAXIA TYPE 21 Is also known as sca21

• Intellectual disability
• Global developmental delay
• Ataxia
• Nystagmus
• Neoplasm

SOURCES: MESH OMIM ORPHANET MENDELIAN

Acute inflammatory demyelinating polyradiculoneuropathy (AIDP) is an inflammatory neuropathy belonging to the clinical spectrum of Guillain-Barré syndrome (GBS; see this term).

ACUTE INFLAMMATORY DEMYELINATING POLYRADICULONEUROPATHY Is also known as guillain-barrÉ syndrome, acute inflammatory demyelinating polyradiculoneuropathic form|aidp|acute inflammatory polyneuropathy|acute idiopathic demyelinating polyneuropathy|gbs, acute inflammatory demyelinating polyradiculoneuropathic form

• Generalized hypotonia
• Hyporeflexia
• Gait ataxia
• Unsteady gait
• Drooling

SOURCES: ORPHANET MENDELIAN