Iranchild1: Створена сторінка: Metaiodobenzylguanidine (123I-MIBG) is an analog of norepinephrine that accumulates in neurosecretory vesicles via the norepinephrine transporter and passive di...

2017-01-09T10:56:30Z

Створена сторінка: Metaiodobenzylguanidine (123I-MIBG) is an analog of norepinephrine that accumulates in neurosecretory vesicles via the norepinephrine transporter and passive di...

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Metaiodobenzylguanidine (123I-MIBG) is an analog of norepinephrine that accumulates in neurosecretory vesicles via the norepinephrine transporter and passive diffusion and is widely used in diagnosis and localization of pheochromocytoma [1]. A recent meta-analysis showed that the sensitivity of 123I-MIBG scintigraphy is 94% (95% CI, 91�C97%) with a specificity of 92% (95% CI, 87�C98%) for pheochromocytoma [2]. Rare cases of false positive uptake have been reported in hepatocellular carcinoma, adrenocortical carcinoma, malignant lymphoma, and adrenocortical adenoma [3�C6]. [http://www.selleckchem.com/products/MS-275.html MS-275 cell line] Pheochromocytoma results in hypertension in 0.5% of patients and adrenal incidentaloma in 4% of cases; approximately 24% of neuroendocrine tumors are related to gene mutations associated with a hereditary syndrome [7, 8]. The patient in the present case report was histologically diagnosed following surgical resection as having undifferentiated adrenal malignant tumor that showed positive uptake on 123I-MIBG scintigraphy, which is intended to detect pheochromocytoma. 2. Case Presentation A 67-year-old man was admitted with epigastric pain. At the time of the admission, blood pressure was 100/60?mmHg, pulse was 92 beats/min, [https://en.wikipedia.org/wiki/Quinapyramine Quinapyramine] respiratory rate was 20 breaths/min, and temperature was 37.2��C. The patient was referred to our hospital with general weakness and a weight loss of 10?kg for the last 3 months. Mild epigastric tenderness was revealed during physical examination. His laboratory tests revealed anemia with hemoglobin of 7.6?g/dL and leukocytosis with white blood cell count of 18,380/mm3. A comprehensive metabolic blood panel revealed a low albumin level of 2.5?g/dL, low sodium of 130?mEq/L, increased AST/ALT of 131/117?IU/L, and increased alkaline phosphatase of 539?IU/L. [http://www.selleckchem.com/products/GDC-0449.html selleck] Renal functions were normal. An electrocardiogram revealed right bundle branch block, with no changes compared to the previous exam. The levels of creatine kinase MB and troponin-I were normal. Abdominal computed tomography (CT) revealed a heterogeneous left adrenal mass 6?cm in diameter, accompanied by hemorrhaging (Figure 1). Figure 1 Contrast-enhanced abdominal computed tomography shows a heterogeneously enhancing left adrenal mass (4.8 �� 5.7?cm) with irregular internal tumor necrosis (white arrow). There was no abnormality in the right adrenal gland (not shown). Hormonal testing through 24 h urine collection showed the following results: epinephrine: 4.8?��g/day (range, 0~20); norepinephrine: 52.1?��g/day (range, 15~80); 17-ketosteroid: 5.76?mg/day (range, 10~25); and metanephrine: 0.47?mg/day (range, 0~1.3). The levels of urine vanillylmandelic acid (VMA), 10.42?mg/day (range, 0~8), and urine-free cortisol, 491.4?��g/day (range, 55.5~286), were elevated. In addition, plasma ACTH,

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Iranchild1: Створена сторінка: Metaiodobenzylguanidine (123I-MIBG) is an analog of norepinephrine that accumulates in neurosecretory vesicles via the norepinephrine transporter and passive di...