hCG-secreting pineal teratoma causing precocious puberty:: report of two patients and review of the literature - Nogueira, Katia; Liberman, Bernardo; Pimentel Filho, Fernando Rodrigues; Goldman, Jaime; Silva, Maria Elizabeth Rossi; Vieira, Joaquim Oliveira; Buratini, Jose Augusto; Cukiert, Arthur (Journal of Pediatric Endocrinology & Metabolism, 2002)