<prompt> Most common cause of central precocious pubey in girls:Exogenous estrogenIdiopathicCNS tumorHypothyroidism  <response>: - MCC of central precocious pubey in girls is Idiopathic. - Organic causes are more common in boys. - OTHER CAUSES: Infections - TB, meningitis Injuries - Trauma, neurosurgery, Radiotherapy Tumors - Hypothalamic hamaoma Gelastic seizures- MCC of organic central precocious pubey CNS malformations like arachnoid cyst ,hydrocephalus, septo-optic dysplasia 