Early onset refers to the presentation of a disorder or syndrome prior to the expected age of onset.

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Late onset at psychology-glossary.com■■■■■■
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Asperger's syndrome at psychology-glossary.com■■■■■
Asperger's syndrome refers to a Pervasive developmental disorder characterized by symptoms of autism, . . . Read More
Huntington’s chorea at psychology-glossary.com■■■■
- Huntington’s chorea : Huntington's chorea is another name for Huntington's disease which refers to . . . Read More
DSM-IV at psychology-glossary.com■■■■
DSM-IV refers to the 4th edition of "Diagnostic and Statistical Manual of Mental Disorders " (DSM) , . . . Read More
Adolescent-Onset Conduct Disorder at psychology-glossary.com■■■■
Adolescent-Onset Conduct Disorder refers to a specific type of Conduct Disorder for which the characteristics . . . Read More
Childhood-onset conduct disorder at psychology-glossary.com■■■■
childhood-onset conduct disorder refers to a specific type of conduct disorder whereby the child displays . . . Read More
Primary Hypersomnia at psychology-glossary.com■■■
Primary Hypersomnia is in the Category of Sleep Disorders; - Etiology Hypersomnia is present in up to . . . Read More
Premenstrual Dysphoric Disorder at psychology-glossary.com■■■
Premenstrual Dysphoric Disorder is a syndrome in which a woman experiences an increase in depressive . . . Read More
Myotonic dystrophy at psychology-glossary.com■■■
Myotonic dystrophy refers to a slowly progressing disease that onsets anytime from childhood through . . . Read More
Ataxia at psychology-glossary.com■■■
Ataxia refers to the inability to maintain normal postures and perform normal movements. Movements are . . . Read More