• Tumori · Sep 1996

    Review Case Reports

    Malignant pheochromocytoma in multiple endocrine neoplasia type 2B syndrome. Case report and review of the literature.

    • L Scopsi, M R Castellani, M Gullo, F Cusumano, E Camerini, B Pasini, and S Orefice.
    • Endocrinology Unit, Istituto Nazionale Tumori, Milan, Italy. scopsi@vl.village.it
    • Tumori. 1996 Sep 1; 82 (5): 480-4.

    AbstractA malignant behavior (i.e., distant metastatic spread) has been recorded in 3-4% pheochromocytomas occurring in the context of multiple endocrine neoplasia type 2A syndrome, but has never been documented in patients with the type 2B form. In this report we describe a case of malignant pheochromocytoma arising in the latter syndrome setting. The patient, a white young male, had the full-blown syndrome, including multicentric, bilateral medullary thyroid carcinoma metastatic to regional lymph nodes, mucosal neuromas, digestive ganglioneuromatosis, marfanoid habitus, and bumpy lips. Three and a half years after surgical resection of an apparently benign adrenal pheochromocytoma he developed widespread osseous metastases. The presence of hypertensive crises and high urinary catecholamine excretion rates, coupled to moderate hypercalcitoninemia, normal circulating carcinoembryonic antigen levels, negative whole-body 99mTc-(V) dimercaptosuccinic acid scan, and absence of neck or mediastinal disease by magnetic resonance imaging, proved that the metastases were from his previous adrenal and not thyroid tumor. Furthermore, since the bone metastases strongly accumulated 131I-metaiodobenzylguanidine, several courses of the radiocompound were given, which resulted in an objective, though partial, tumor regression.

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