NCIt definition : Unusually early sexual maturity.;
Alternative definition : CTCAE: A disorder characterized by unusually early development of secondary sexual
features; the onset of sexual maturation begins usually before age 8 for girls and
before age 9 for boys.; NICHD: Onset and progression of breast development before the age of 8 years in girls
and testicular enlargement before the age of 9 years in boys.;