Zoran Erlic, Hartmut P.H. Neumann
Pheochromocytomas and Paragangliomas (PGL) form the group of paraganglial tumours which can occur in any paraganglia from the skull base to the pelvic floor. The terminology is not uniform. While the World Health Organization (WHO) applies pheochromocytoma exclusively to adrenal tumours, many clinicians use the term pheochromocytoma also for extra-adrenal abdominal and thoracic tumours, since by tradition …