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Down syndrome or Down's syndrome, also known as trisomy 21, is a genetic disorder caused by the presence of all or part of a third copy of chromosome 21. [3] It is usually associated with developmental delays, mild to moderate intellectual disability, and characteristic physical features. [1] [12] There are three types of Down syndrome, the ...
The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8- or 9-year-old child, but this number varies widely. At the same time, they enjoy a rich social and emotional awareness. Down syndrome is the most common chromosome abnormality in humans, occurring in about one per 1000 babies born each year.
Turner syndrome (TS), also known as 45,X, or 45,X0, is a genetic disorder in which a person's cells have only one X chromosome or are partially missing an X chromosome (sex chromosome monosomy).
He was left permanently paralyzed from the waist down. Roosevelt was diagnosed with "infantile paralysis" (paralytic polio) at the time, but his symptoms are more consistent with Guillain–Barré syndrome, which his doctors failed to consider as a diagnostic possibility. See Franklin D. Roosevelt's paralytic illness for more information.
Signs and symptoms. The disease manifests in young children, with symptoms usually beginning to appear between two and six years of age. Affected infants appear normal, although some mild facial dysmorphism may be noticeable; however, compared to all other MPS diseases, Sanfilippo syndrome produces the fewest physical anomalies.
Narcissistic personality disorder (NPD) is a personality disorder characterized by a life-long pattern of exaggerated feelings of self-importance, an excessive need for admiration, and a diminished ability to empathize with other people's feelings.
Impostor syndrome, also known as impostor phenomenon or impostorism, is a psychological experience of intellectual and professional infraudulence. It is "the subjective experience of perceived self-doubt in one's abilities and accomplishments compared with others, despite evidence to suggest the contrary."
Seckel syndrome, or microcephalic primordial dwarfism (also known as bird-headed dwarfism, Harper's syndrome, Virchow–Seckel dwarfism and bird-headed dwarf of Seckel) is an extremely rare congenital nanosomic disorder.