|Title:||131i-6beta-Iodomethyl-19-Norcholesterol Spect/Ct for Primary Aldosteronism Patients with Inconclusive Adrenal Venous Sampling and Ct Results||Authors:||YEN, RUOH-FANG
LIU, KAO- LANG
YEN, RUOH -FANG
|Keywords:||NP-59;SPECT/CT;primary aldosteronism;adrenal adenoma||Issue Date:||2009||Journal Volume:||v.50||Journal Issue:||n.10||Start page/Pages:||1631-1637||Source:||THE JOURNAL OF NUCLEAR MEDICINE||Abstract:||
The 2 main causes of primary aldosteronism (PA) are aldosterone-producing adenoma (APA) and idiopathic adrenal hyperplasia (IAH). Dexamethasone- suppression (131)I-6beta- iodomethyl-19-norcholesterol (NP-59) adrenal scintigraphy can assess the functioning of the adrenal cortex. This study evaluated the diagnostic usefulness of NP-59 SPECT/CT in differentiating APA from IAH and in predicting postadrenalectomy clinical outcome for PA patients who had inconclusive adrenal venous sampling (AVS) and CT results . METHODS: We retrospectively reviewed the 31 adrenal lesions of 27 patients (age range, 33-71 y; mean age +/- SD, 50.4 +/ - 10.9 y) who had been clinically confirmed (by saline infusion and captopril tests) to have PA, had inconclusive CT and AVS test results, and had undergone NP-59 imaging before adrenalectomy. The accuracy of NP-59 imaging was determined by comparison with histopathologic findings. RESULTS: NP-59 SPECT/CT gave us 18 true-positive, 3 false- positive, 6 true-negative, and 4 false- negative results. Compared with planar imaging, SPECT/CT significantly improved diagnostic accuracy and prognostic predicting ability (P = 0.0390 and P = 0.0141, respectively). The NP-59 results were negative for 7 of the 23 patients with unilateral adrenal lesions, and none of these 7 patients had shown postsurgical clinical improvement. CONCLUSION: NP-59 SPECT/CT is an effective imaging tool for differentiating APA from IAH in PA patients whose CT and AVS results are inconclusive. Our results suggest that patients with presurgically negative NP-59 results should be treated medically and that noninvasive NP-59 SPECT/CT may be suited for use as the first lateralization modality after CT in patients with clinically confirmed PA.
|Appears in Collections:||醫學系|
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