Molecular and Cellular Ontogeny of Distinct Pituitary Cell Types, Cheryl A. Pickett and Arthur Gutierrez-Hartman. Hypopituitarism: Differential Diagnosis and Treatment, Mary Lee Vance. Prolactin: Normal Physiology, Virginia D. Sarapura. Differential Diagnosis and Management of Hyperprolactinemia, Janet A. Schlechte. Growth Hormone: Normal Physiology, Ian M. Chapman and Michael O. Thorner. Growth Hormone Deficiency: Differential Diagnosis and Treatment, Maya K. Hunter and Ron G. Rosenfeld. Acromegaly: Differential Diagnosis and Treatment, Ilan Shimon and Shlomo Melmed. ACTH: Normal Physiology, Richard I. Dorin and Lawerance M. Crapo. Cushing Syndrome: Differential Diagnosis and Treatment, Maria Alexandra Magiakou, George Mastorakos, and George P. Chrousos. Gonadotropin: Normal Physiology, Francois P. Pralong and William F. Crowley, Jr. Gonadotropin Deficiency: Differential Diagnosis and Treatment, Corrine K. Welt and Janet E. Hall. Gonadotropin (FSH and LH) Pituitary Tumors: Differential Diagnosis and Treatment, Eun Jig Lee and J. Larry Jameson. Alpha Subunit Secreting Pituitary Tumors, Tamis M. Bright and E. Chester Ridgway. TSH: Normal Physiology, Joshua D. Safer and Frederic E. Wondisford. Thyrotropin-Secreting Pituitary Tumors: Different Diagnosis and Treatment, Mary H. Samuels. Infiltrative Diseases of the Pituitary Gland, Michael T. McDermott. Imaging of the Sella and Perisellar Region, John Stears. Neurosurgical Approach to Pituitary Adenomas, Kevin O. Lillehei. Immunohistochemistry of Pituitary Adenomas, B. K. Kleinschmidt-DeMasters. Index.