This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
Eight year girl presented by her mother with sexual precocity. She may have the following disorder: 
Select and explain. 
A. Hypehyroidism, B. Addison's disease, C. McCune Albright syndrome, D. Neuroblastoma
C: McCune Albright syndrome
Answer: C: McCune Albright syndrome 
Explanation: McCune-Albright syndrome (MAS) is classically manifested as a triad of irregular cafe au lait spots, fibrous dysplasia of long bones with cysts, and precocious pubey (sexual precocity). This is a sporadic disorder caused by somatic (postzygotic) activating mutations in the GSalpha subunit that links G protein-coupled receptors to intracellular signaling pathways. Precocious pubey may be central or incomplete. Other clinical manifestations include, Hypehyroidism Adrenal nodules with Cushing syndrome Acromegaly Hyperprolactinemia Hyperparathyroidism Hypophosphatemic hyperphosphaturic rickets Autonomous endogenous-functioning ovarian cysts (in girls) Must know: Causes of Precocious Pubeal Development: Central (GnRH-dependent) precocious pubey: Idiopathic Central nervous system abnormalities Acquired--abscess, chemotherapy, radiation, surgical trauma Congenital--arachnoid cyst, hydrocephalus, hypothalamic hamaoma, septo-optic dysplasia, suprasellar cyst Tumors--astrocytoma, craniopharyngioma, glioma Peripheral (GnRH-independent) precocious pubey: Congenital adrenal hyperplasia Adrenal tumors McCune-Albright syndrome Familial male-limited gonadotropin independent precocious pubey Gonadal tumors Exogenous estrogen--oral (contraceptive pills) or topical Ovarian cysts (females) HCG-secreting tumors (eg, hepatoblastomas, choriocarcinomas) (males) Ref: Styne D. (2011). Chapter 15. Pubey. In D.G. Gardner, D. Shoback (Eds), Greenspan's Basic & Clinical Endocrinology, 9e.