Female, age 2, with seizures, profound global developmental delay, involuntary movements (chorea), and elevated serum pipecolic acid
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Male, age 18, with weak and brittle bones (osteoporosis), immune system abnormalities (antinuclear antibody positivity), and type 1 diabetes mellitus
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Female, age 18, with seizures, severe intellectual disability, regression, and abnormal brain findings
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Female, age 16, with intellectual disability, seizures, and brain and skeletal abnormalities (craniosynostosis, congenital hip and knee dislocation, hydrocephalus with an Arnold-Chiari type I malformation)
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Female, age 10, with Turner syndrome and an undiagnosed neurological condition
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Male, age 39, with involuntary muscle contractions (dystonia), difficulty speaking (dysphonia), and abnormal eye movements (saccadic smooth pursuit)
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Male, age 10, with severe global developmental delay, seizures, and aggressive behavior
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Male, age 1, with skeletal and brain anomalies, cloudy corneas, and adrenal insufficiency
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Male, age 4, with global developmental delay, brain abnormalities, seizures, and hearing and vision loss
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Male, age 12, with rapid progression of muscle weakness, problems with coordination (ataxia), difficulty speaking (dysarthria), and severe cerebellar atrophy on brain imaging
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