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Costeff syndrome

Costeff syndrome Overview Costeff syndrome, also known as 3-methylglutaconic aciduria type III, is a rare inherited metabolic and neuro-ophthalmological disorder characterized by early-onset vision loss due to optic nerve degeneration, followed later by movement difficulties. Symptoms Vision Symptoms • Optic atrophy: Worsening vision and loss of visual acuity starting in infancy or early childhood. • Nystagmus: Fast, involuntary eye movements. • Strabismus: Eyes that do not line up or look in the same direction. Movement and Neurological Symptoms • Chorea: Involuntary, unpredictable body movements starting in late childhood. • Ataxia: Poor muscle control and balance issues. • Spasticity: Stiff muscles and tight reflexes (spastic paraparesis) that can worsen over time. • Delayed milestones: Late walking or delayed motor skill development. • Dysarthria : Difficulty speaking clearly. Other Signs • Cognitive impact: Many individuals have normal intelligence, though some experience mi...
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Tyrosine Hydroxylase Deficiency

Tyrosine Hydroxylase Deficiency Overview Tyrosine hydroxylase deficiency (THD) is a rare genetic disorder characterized by a wide spectrum of symptoms. These symptoms can vary widely in people who are affected, and even among members of the same family. Common symptoms include an uncoordinated manner of walking (abnormal gait) and dystonia. Dystonia is a general term describing involuntary muscle contractions that force the body into abnormal, sometimes painful, movements and positions (postures). In THD, dystonia usually affects the legs, but can include other parts of the body (generalized dystonia). Additional symptoms may include a tendency to walk on tiptoes, difficulty walking, tremors, eye abnormalities, muscle weakness (hypotonia) and intellectual disability. However, there are fewer than 100 case reports of individuals with THD in the medical literature, so it is difficult to predict all the features of the disorder. THD is caused by changes (mutations) in the TH gene. This ge...
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Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS)

Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS) Overview Autosomal recessive spastic ataxia of Charlevoix-Saguenay (ARSACS) is a rare inherited neurodegenerative disorder that affects balance, muscle control, and peripheral nerves ARSACS is a neuromuscular condition characterized by the progressive degeneration of the cerebellum and spinal cord. Symptoms ARSACS is defined by three main clinical features: Cerebellar ataxia: Balance and coordination problems, leading to a clumsy or wide-based gait, frequent falls, and poor coordination in the arms and hands. Spasticity: Abnormal, progressive muscle stiffness and tensing, which usually affects the legs more severely over time. Sensorimotor polyneuropathy: Reduced sensation, weakness, and numbness in the arms and legs due to damage to the peripheral nerves Musculoskeletal changes: Distal muscle wasting (amyotrophy) in the hands and feet, foot deformities such as high arches (pes cavus), and spinal curvature (scoliosis...
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Spastic Paraplegia Type 49

Spastic Paraplegia Type 49 Overview The first symptom of spastic paraplegia type 49 is typically weak muscle tone (hypotonia) that starts in infancy. The spasticity and paraplegia gradually worsen over time during childhood, leading to difficulty walking and frequent falls. Affected individuals may also have intellectual disability and distinctive physical features, including short stature, chubbiness, and smaller head size (microcephaly). There is currently no specific treatment to prevent or reverse progressive disability in patients with spastic paraplegia. This condition is caused by pathogenic (disease-causing) variants in the TECPR2 gene. Additionally, spastic paraplegia type 49 exhibits autosomal recessive inheritance, meaning both parents must be carriers to have a 25% chance of having a child with the condition. The risk of being a carrier is based on a person’s ancestry or ethnic background. For example, individuals of Sephardic Jewish- Bukharian descent have a carrier freque...
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Troyer syndrome

Troyer syndrome Overview Troyer syndrome is a rare, complex form of hereditary spastic paraplegia characterized by progressive muscle stiffness and weakness in the lower limbs, developmental delays, and muscle wasting A complex hereditary spastic paraplegia (HSP) that causes the slow degeneration of motor neurons and muscle cells. Symptoms Leg Problems: Progressive muscle stiffness (spasticity), weakness, and wasting in the legs, leading to difficulty walking, permanent leg shortening (contractures), and often the need for assistive devices or a wheelchair later in life. Developmental Delays : Delays in learning to walk and talk during childhood. Speech and Swallowing Issues: Speech difficulties (dysarthria), pseudobulbar palsy (trouble controlling facial muscles, chewing, and swallowing), and trouble managing oral secretions or drooling. Hand Weakness: Muscle wasting and weakness in the hands (distal amyotrophy). Physical Stature: Short stature and subtle skeletal abnormalities, su...
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Spinocerebellar ataxia type 3 (SCA3)

Spinocerebellar ataxia type 3 (SCA3) Overview               Spinocerebellar ataxia type 3 (SCA3), also known as Machado-Joseph disease, is a rare, inherited genetic disorder that causes progressive loss of balance, coordination, and movement control Symptoms Ataxia : Unsteady gait, stumbling, and poor hand-eye coordination. Spasticity and Rigidity: Tight, stiff muscles and slow movement. Dystonia: Uncontrolled muscle tensing that leads to unusual postures or twisting. Tremors: Shaking when attempting fine motor tasks or using the hands. Bulging Eyes: A distinct "staring" or wide-eyed appearance (eyelid retraction). Double Vision: Difficulty moving the eyes normally, slow eye movements, or impaired gaze (ophthalmoplegia). Dysarthria: Slow, slurred, or unclear speech. Dysphagia: Trouble swallowing, which can increase the risk of choking Peripheral Neuropathy : Numbness, tingling, cramps, or burning pain in the hands and feet. Sleep Disorders:...
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Axenfeld-Rieger Syndrome

 Axenfeld-Rieger Syndrome Overview What Is Axenfeld-Rieger Syndrome? Axenfeld-Rieger syndrome (ARS) is a rare genetic condition that affects how your child’s body develops, especially their eyes. It can also affect their teeth and other parts of their body. But this is less common. Healthcare providers usually diagnose ARS when a baby is born, or when they start showing symptoms as infants. Having ARS can affect your child’s vision and lead to other eye issues throughout their life. It’s likely that your child will develop glaucoma at some point if they have ARS. Your child will need regular eye exams as they grow and develop. Visit a healthcare provider if you notice any new symptoms or changes in your child’s eyes or body. Symptoms Healthcare providers group ARS symptoms based on where they affect your child: Ocular symptoms affect your child’s eyes. Systemic symptoms happen in other parts of their body, outside their eyes. Eye symptoms of ARS can include: Thin or underdeveloped ...
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