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00039_Field_SRC.c01.C.8.txt
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1997-01-28
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526b
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Endoscopy and Biopsy
• A biopsy is necessary for a definitive diagnosis and is most useful for patients with suspected metastatic
disease. The primary tumor may be biopsied surgically or with a CT- or ultrasound-directed needle biopsy or
surgically after a metabolic work-up reveals it is not a pheochromocytoma. Biopsies of suspected
pheochromocytoma must not be undertaken without full catecholamine blockade (see below).
• Alternatively, an accessible metastasis in the lymph nodes or liver can be biopsied.