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Composite MET-PET Fusion MRI is a Novel Method to Determine Adjuvant Therapy for Growth Hormone Secreting Adenomas | OMICS International | Abstract
ISSN: 2167-0943

Journal of Metabolic Syndrome
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Research Article

Composite MET-PET Fusion MRI is a Novel Method to Determine Adjuvant Therapy for Growth Hormone Secreting Adenomas

Hidetoshi Ikeda1*, Yasuhiro Kikuchi2 and Kazuo Watanabe3
1Research Institute for Pituitary Diseases, Southern Tohoku General Hospital, Koriyama, Fukushima, Japan
2Department of Gamma Knife Surgery, Southern Tohoku General Hospital, Koriyama, Fukushima, Japan
3Research Institute for Neuroscience, Southern Tohoku General Hospital, Koriyama, Fukushima, Japan
Corresponding Author : Hidetoshi Ikeda, M.D. Ph.D.
Research Institute for Pituitary Diseases
Southern Tohoku General Hospital
7-115 Yatsuyamada, Koriyama
Fukushima 963-8563, Japan
Tel: +81-24-934-5322
Fax: +81-24-922-5320
E-mail: [email protected]
Received September 20, 2012; Accepted November 14, 2012; Published November 16, 2012
Citation: Ikeda H, Kikuchi Y, Watanabe K (2012) Composite MET-PET Fusion MRI is a Novel Method to Determine Adjuvant Therapy for Growth Hormone Secreting Adenomas. J Metabolic Synd S2:004. doi:10.4172/2167-0943.S2-004
Copyright: © 2012 Ikeda H et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Background: Normalization of abnormal Growth Hormone (GH) and Insulin-like Growth Factor (IGF)-1 secretion is essential for the treatment of acromegaly. Although the diagnostic accuracy of magnetic resonance imaging (MRI) has increased in recent years, MRI may fail to detect residual adenoma, even in patients with high IGF-1 levels. The recently developed composite methionine (MET)-PET fusion 3 Tesla (3T)-MRI technique has helped us to determine the location of adenomas that could not be detected by conventional MRI. Regions with high MET uptake are suggestive of residual adenomas. In this study, we sought to confirm the positional relationship between regions of high MET uptake and the sites of viable residual adenoma cells.
We analyzed the results of six patients who underwent gamma knife radiosurgery or re-operation as adjuvant therapy with the aid of composite MET-PET fusion MRI.
Results: Based on our experiences in these six patients, composite MET-PET fusion 3T-MRI is useful to plan surgery, and to plan the dose and area of radiation required for gamma knife radiosurgery of an active lesion.
Conclusion: The use of composite MET-PET fusion 3T-MRI and subsequent dose planning enabled us to achieve a high remission rate with adjuvant therapy for patients with acromegaly, because MET-PET could clearly detect and delineate the residual tumor.


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