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Pfeiffer syndrome. Pfeiffer syndrome is a rare genetic disorder, characterized by the premature fusion of certain bones of the skull (craniosynostosis), which affects the shape of the head and face. The syndrome includes abnormalities of the hands and feet, such as wide and deviated thumbs and big toes. Pfeiffer syndrome is caused by mutations ...
Niemann–Pick type C (NPC) (colloquially, "Childhood Alzheimer's " [1]) is a lysosomal storage disease associated with mutations in NPC1 and NPC2 genes. Niemann–Pick type C affects an estimated 1:150,000 people. [2] Approximately 50% of cases present before 10 years of age, but manifestations may first be recognized as late as the sixth decade.
Neurology. Primary familial brain calcification[ 1 ] (PFBC), also known as familial idiopathic basal ganglia calcification (FIBGC) and Fahr's disease, [ 1 ] is a rare, [ 2 ] genetically dominant or recessive, inherited neurological disorder characterized by abnormal deposits of calcium in areas of the brain that control movement.
23 (2019) [1] Jordan's syndrome (JS) or PPP2R5D-related intellectual disability is a rare autosomal dominant neurodevelopmental disorder caused by de novo mutations in the PPP2R5D gene. [2] It is characterized by hypotonia, intellectual disability, and macrocephaly. [3] Children with JS may also have epilepsy or meet criteria for diagnosis with ...
Neuropathy, ataxia, and retinitis pigmentosa, also known as NARP syndrome, is a rare disease with mitochondrial inheritance that causes a variety of signs and symptoms chiefly affecting the nervous system [1] Beginning in childhood or early adulthood, most people with NARP experience numbness, tingling, or pain in the arms and legs (sensory neuropathy); muscle weakness; and problems with ...
Familial exudative vitreoretinopathy (FEVR, pronounced as fever) is a genetic disorder affecting the growth and development of blood vessels in the retina of the eye. This disease can lead to visual impairment and sometimes complete blindness in one or both eyes. FEVR is characterized by incomplete vascularization of the peripheral retina.
Neurology. Refsum disease is an autosomal recessive [5] neurological disease that results in the over-accumulation of phytanic acid in cells and tissues. It is one of several disorders named after Norwegian neurologist Sigvald Bernhard Refsum (1907–1991). [6][7] Refsum disease typically is adolescent onset and is diagnosed by above average ...
Mild cognitive impairment (MCI) is a neurocognitive disorder which involves cognitive impairments beyond those expected based on an individual's age and education but which are not significant enough to interfere with instrumental activities of daily living. [1] MCI may occur as a transitional stage between normal aging and dementia, especially ...