Perspectives in Pediatric Pathology, Chapter 3. Testicular Development from Birth to Puberty: Systematic Evaluation of the Prepubertal Testis MANUEL NISTAL, RICARDO PANIAGUA, PILAR GONZALEZ-PERAMATO, AND MIGUEL REYES-MUGICA Department of Pathology, Hospital La Paz, Universidad Autonoma de Madrid, Calle Arzobispo Morcillo #2, Madrid 28029, Spain Department of Cell Biology, Universidad de Alcala, Madrid, Spain Department of Pathology, Children’s Hospital of Pittsburgh of UPMC, One Children’s Hospital Drive, 4401 Penn Avenue, Pittsburgh, PA 15224, USA