Classification and Conditions Causing Precocious Puberty True PP Pseudo, PP Incomplete P.P. 1. Idiopathic 1.Tumors 1. Premature thelarche 特发性(体质性) Ovarian T 单纯性乳房早发育 2. CNS Disorders Leydig cell T 2. Premature adrenarche *space-occupying 2. adrenal disorders 单纯性阴毛早现 esions *Congenital adrenal 3. Premature menarche congenital CNS hyperplasia 孤立性早潮 anomalies *Secondary adrenal pc postinfection or hyperplasia tramua *adrenal tumor 3. Hypothyroidism 3. GnRH induced Tumor 4. Exogenous sex hormones 5. McCune-Albright Syndrome