A comprehensive review of recent molecular discoveries that can clarify the pathophysiology of endocrine disease processes and contribute to the diagnostic aspects of endocrine pathology. Surgeons, medical oncologists, and radiation therapists discuss the treatment of endocrine disorders, especially tumors, with emphasis on differential diagnosis and on broadening the perspective that the endocrine pathologist must have in making specific tissue diagnoses. Of interest to practicing pathologists, pathology residents, endocrinologists, endocrinologists in training, veterinarians, and interested researchers.