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DOI: 10.1055/s-0030-1270511
© J. A. Barth Verlag in Georg Thieme Verlag KG Stuttgart · New York
Extra-adrenal Pheochromocytoma in the Organ of Zuckerkandl: Diagnosis and Treatment Strategies
Publication History
received 13.10.2010
first decision 01.12.2010
accepted 22.12.2010
Publication Date:
03 March 2011 (online)


Abstract
Pheochromocytoma (PHEO) and paraganglioma (PGL) are rare catecholamine-secreting neuroendocrine tumors arising from chromaffin tissue and can occur within the adrenal medulla (PHEO) or extra-adrenal sites (PGL). The most common site for PGL is the organ of Zuckerkandl, extra-adrenal chromaffin tissue near the origin of the inferior mesenteric artery.We here present 2 patients with extra-adrenal PGL in the organ of Zuckerkandl, located by iodine-123-metaiodobenzylguanadine (123I-MIBG) scintigraphy and thereafter treated surgically or with iodine-131-metaiodobenzylguanadine (131I-MIBG). First, in a 15-year-old boy with clinical suspicion of PHEO, the diagnosis was established by biochemical evaluation and confirmed by further imaging studies, including CT and 123I-MIBG, as PGL in the Zuckerkandl organ. The tumor was completely resected by laparotomy. Second, in a 70-year-old woman presenting with progressive hypertension and palpitations, MR and 123I-MIBG revealed a singular tumor lesion with abnormal 123I-MIBG uptake in the Zuckerkandl organ. Due to severe general vascular disease, surgery was not performed and instead the patient underwent 131I-MIBG therapy. The patient showed a good symptomatic response with improvement of symptoms and no relevant side-effects of therapy.
Key words
extra-adrenal Pheochromocytoma - iodine-123-metaiodobenzylguanadine (123I-MIBG) - iodine-131-metaiodobenzylguanadine (131I-MIBG)