(medicine, psychology, psychiatry) A state of agitation, confusion, or delirium, especially in elderly patients suffering from Alzheimer's disease or other forms of dementia, which begins daily at nightfall and which is alleviated by daylight.

A genetic condition in which a person is born with two X chromosomes and one Y chromosome.

A neurological disorder characterized by a constellation of symptoms that suggest the presence of a lesion in a particular area of the brain.

A group of mental phenomena involving religious delusion or obsession relating to the city of Jerusalem.

A rare genetic disorder linked to the X chromosome, causing physical anomalies and developmental delays, characterised by retardation, hyperactive behaviour, constipation, hypotonia, and a characteristic facial appearance.

A particular genetic disease, characterized by facial anomalies and missing toes.

A combination of medical disorders that increase the risk of developing cardiovascular disease and diabetes.

A nontraumatic subluxation of the atlantoaxial joint caused by inflammation of the adjacent tissues.

An autoimmune disorder in which immune cells attack and destroy the exocrine glands that produce tears and saliva.

(medicine) A rare congenital disorder characterized by the reduction or absence of peroxisomes in the cells of the liver, kidneys, and brain and the inability to beta-oxidize very-long-chain fatty acids.