Labels:text | screenshot | black | font | black and white | document OCR: ed to locate A variety of methods have b o ninety per cent phaeochromoctomas. Eighty renal medulla, of these tumours arise from hours are and in ten per cent of cases, t ay arise from bilateral. Non-adrenal tumo de the aorta or its sympathetic ganglia, usual: a le urinary branches or, rarely, in the wa bladder. Less than one per ce utside the phaeochromocytomas are fo hom a alised by CT, abdominal cavity, In patients phaeochromocytoma cannot it may be nuclear scanning or arteriog eter study and ll the major necessary to perform a veno measure catecholamine leve .techolamine veins to determine the sour excess See also: aphy . Phaeochromocytoma - Ar ing Phaeochromocytoma - CT Phaeochromocytoma - Nu