title: Thallium-201 scintigraphy in the diagnosis of pheochromocytoma.
abstract: 6 patients were studied by 201Tl scintigraphy; 1 of them suffered from a benign, and another from a malignant adrenal pheochromocytoma. 1 patient had a hormonal inactive adrenal tumor, 3 others multiple organ metastases of malignant pheochromocytomas. At the same time, 3 of the patients were studied by 131I-metaiodobenzylguanidine (131I-MIBG) scintigraphy. Using different techniques like kinetic studies, whole-body scan or a 201Tl-99m-Tc difference scan, benign and malignant pheochromocytoma tissues could be localized by 201Tl scintigraphy. Benign and malignant pheochromocytomas showed different kinetics of 201Tl. In 2 patients with multiple organ metastases of malignant pheochromocytomas, the metastases were partly imaged by 131I-MIBG, the others by 201Tl.
mesh_terms: D019797:3-Iodobenzylguanidine; D000310:Adrenal Gland Neoplasms / Q000000981:diagnostic imaging*; D000311:Adrenal Glands / Q000000981:diagnostic imaging; D006801:Humans; D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D009362:Neoplasm Metastasis; D010673:Pheochromocytoma / Q000000981:diagnostic imaging*; D011868:Radioisotopes; D011877:Radionuclide Imaging; D013793:Thallium
chemical_list: D007457:Iodine Radioisotopes; D007462:Iodobenzenes; D011868:Radioisotopes; D019797:3-Iodobenzylguanidine; D013793:Thallium