Endocrine Abstracts

Introduction: Adrenal pheochromocytomas have the same embryonic origin, i.e. the neural crest, as peripheral neuroblastic tumors such as ganglioneuromas, ganglioneuroblastomas and neuroblastomas. Ganglioneuromas are benign and silent tumors in that they usually do not secrete catecholamines in contrast to pheochromocytomas. Rarely, they can associate with pheochromocytomas to form composite tumors.Patients and methods: We have retrospectively studied sev...