<prompt> The most common site of ectopic pheochromocytoma isBladderFilum terminaleCeliac plexusOrgan of Zuckerkandl  <response>: Pheochromocytoma is a chromaffin cell tumor commonly located at adrenal medulla. Ectopic pheochromocytoma EP is considered as pheochromocytomalocated at extra-adrenal site, which usually lies at para-aoic region Ref ganongs review of medical physiology 25e 