Which among the following is the most common site of ectopic phaeochromocytoma?
Almost all pheochromocytomas (about 90%) occur in the abdomen, and most of these (85%) are in the adrenal medulla. Extra-adrenal pheochromocytomas (including sympathetic and parasympathetic paragangliomas) are found in the perirenal area, the organ of Zuckerkandl, the urinary bladder, the hea, the neck, and the posterior mediastinum. Extra-adrenal pheochromocytomas account for 10% of all pheochromocytomas in adults and 30-40% of pheochromocytomas in children. They are usually larger than adrenal pheochromocytomas. Ref: Else T., Hammer G.D., McPhee S.J. (2010). Chapter 12. Disorders of the Adrenal Medulla. In S.J. McPhee, G.D. Hammer (Eds), Pathophysiology of Disease, 6e.
Organ of Zuckerkandl
Bladder
Filum terminale
Celiac plexus