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A Practical Guide for the Production and PET/CT Imaging of 68Ga-DOTATATE for Neuroendocrine Tumors in Daily Clinical Practice
Published on: April 17, 2019
Paragangliomas and Pheochromocytomas: Positron Emission Tomography/Computed Tomography Diagnosis and Therapy
Charles Marcus1, Rathan M Subramaniam2
1Division of Nuclear Medicine and Molecular Imaging, Department of Radiology and Radiological Sciences, Emory University School of Medicine, 1364 Clifton Road Northeast, 1st Floor #E163, Atlanta, GA 30322, USA.
Abstract:
Molecular imaging evaluation of pheochromocytomas and paragangliomas depends on multiple factors, such as localized versus metastatic disease, the genetic, and biochemical profile of tumors. Positron emission tomography/computed tomography (PET/CT) imaging of these tumors outperforms Meta-Iodo-Benzyl-Guanidine (MIBG) scintigraphy in most cases. A few PET radiotracers have been studied in evaluating these patients with somatostatin receptor PET imaging and have shown superior performance compared with other agents in most of these patients. 18F-fluorodeoxyglucose PET/CT imaging is useful in select patients, such as those with succinate dehydrogenase complex subunit B-associated disease. Treatment strategy depends on multiple factors and necessitates a multidisciplinary approach.
Insights
Molecular imaging for pheochromocytomas and paragangliomas utilizes positron emission tomography/computed tomography (PET/CT) scans, which are more effective than MIBG scintigraphy. Somatostatin receptor PET imaging shows superior performance in most patients.
Area of Science:
- Oncology
- Nuclear Medicine
- Radiology
Background:
- Pheochromocytomas and paragangliomas require precise molecular imaging for accurate evaluation.
- Disease characteristics like localization (localized vs. metastatic) and tumor profiles influence diagnostic choices.
Purpose of the Study:
- To compare the efficacy of different molecular imaging modalities for pheochromocytomas and paragangliomas.
- To highlight the role of advanced PET tracers in diagnosing these neuroendocrine tumors.
Main Methods:
- Review of current literature comparing Meta-Iodo-Benzyl-Guanidine (MIBG) scintigraphy with various Positron Emission Tomography/Computed Tomography (PET/CT) tracers.
- Evaluation of somatostatin receptor PET imaging and 18F-fluorodeoxyglucose (FDG) PET/CT in specific patient cohorts.
Main Results:
- PET/CT imaging generally outperforms MIBG scintigraphy for these tumors.
- Somatostatin receptor PET imaging demonstrates superior diagnostic performance in a majority of cases.
- 18F-FDG PET/CT is beneficial for select patients, particularly those with succinate dehydrogenase complex subunit B mutations.
Conclusions:
- Molecular imaging, especially PET/CT with specific radiotracers, is crucial for evaluating pheochromocytomas and paragangliomas.
- Treatment decisions require a multidisciplinary approach, informed by comprehensive imaging findings.
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