Abstract:
PURPOSE:Neuroendocrine diseases are a heterogeneous group of entities with the ability to take up amine precursors, such as L-DOPA, and convert them into biogenic amines, such as dopamine. Congenital hyperinsulinism of infancy (HI) is a neuroendocrine disease secondary to either focal adenomatous hyperplasia or a diffuse abnormal pancreatic insulin secretion. While focal hyperinsulinism may be reversed by selective surgical resection, diffuse forms require near-total pancreatectomy when resistant to medical treatment. Here, we report the diagnostic value of PET with [(18)F]fluoro-L-DOPA in distinguishing focal from diffuse HI. METHODS:Forty-nine children were studied with [(18)F]fluoro-L-DOPA. A thoraco-abdominal scan was acquired 45-65 min after the injection of 4.2 +/- 1.0 MBq/kg of [(18)F]fluoro-L-DOPA. Additionally, 12 of the 49 children were submitted to pancreatic venous catheterisation for blood samples (PVS) and 31 were also investigated using MRI. RESULTS:We identified abnormal focal pancreatic uptake of [(18)F]fluoro-L-DOPA in 15 children, whereas diffuse radiotracer uptake was observed in the pancreatic area in the other 34 patients. In children studied with both PET and PVS, the results were concordant in 11/12 cases. All patients with focal radiotracer uptake and nine of the patients with diffuse pancreatic radiotracer accumulation, unresponsive to medical treatment, were submitted to surgery. In 21 of these 24 patients, the histopathological results confirmed the PET findings. In focal forms, selective surgery was followed by clinical remission without carbohydrate intolerance. CONCLUSION:These data demonstrate that PET with [(18)F]fluoro-L-DOPA is an accurate non-invasive technique allowing differential diagnosis between focal and diffuse forms of HI.
journal_name
Eur J Nucl Med Mol Imagingauthors
Ribeiro MJ,Boddaert N,Bellanné-Chantelot C,Bourgeois S,Valayannopoulos V,Delzescaux T,Jaubert F,Nihoul-Fékété C,Brunelle F,De Lonlay Pdoi
10.1007/s00259-007-0498-ysubject
Has Abstractpub_date
2007-12-01 00:00:00pages
2120-8issue
12eissn
1619-7070issn
1619-7089journal_volume
34pub_type
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