Unusually large amounts of serotonin in the circulating blood; probable cause of some of the symptoms and signs in the carcinoid syndrome.
References in periodicals archive ?
Hyperserotonemia has been observed in 25-40% of children and adolescents with autism (Aldred 2003, Kidd 2003).
Hyperserotonemia in Egyptian autistic children: Relation to allergic manifestations.
The issue of hyperserotonemia and platelet serotonin exposure: a preliminary study.