"Precocious puberty can be completely cured..."

"A three-year-old boy in India has undergone brain surgery to cure premature puberty, which made his genitals grow, deepened the timbre of his voice  and caused acne to sprout on his face."

The boy was just 18 months old when his parents noticed the physical changes that normally start to develop in a boy at least a decade later. His behaviour had also become aggressive."

Precocious puberty occurs because of an abnormal production of oestrogen. It is often caused by damage to the brain or cerebral disorders."
It is more common in girls than boys and resulted in the youngest mother on record, Lina Medina, who gave birth at the age of five years and seven months in Peru in 1939."

International Business Times.