existence starts during Onset Childhood onset 2012-03-25T07:16:20Z Symptoms begin in childhood Onset of disease at the age of between 1 and 5 years. HP:0003617 UMLS:C1837352 This term refers to ages up to but not including the fifth birthday (see Juvenile onset). HP:0003586 HP:0011463 Pediatric onset child stage (1-4 yo)