Octreotide scintigraphy localizes somatostatin receptor-positive islet cell carcinomas.
Tyr-3-Octreotide is a synthetic derivative of somatostatin and a somatostatin-receptor analogue. The iodine-123-labelled compound localizes somatostatin-receptor-positive tumours. In this paper two patients are reported in whom somatostatin receptors were demonstrated in vitro. In a 60-year-old female with an islet cell carcinoma of the pancreas, multiple liver metastases and previously unrecognized bone metastases in the right acetabulum could be diagnosed as the reason for a persistent hypoglycaemia. In a 60-year-old male an islet cell carcinoma of the pancreas was localized with 123I-Tyr-3-octreotide. The somatostatin receptors were demonstrated in vitro and the tumour was successfully treated with somatostatin. These studies demonstrate that 123I-Tyr-3-octreotide offers the possibility of localizing somatostatin-receptor-positive tumours and their metastases. Moreover the method makes it possible to determine the receptor status of a tumour in vivo.
Becker
W
W
Department of Nuclear Medicine and Internal Medicine I, University of Erlangen-Nürnberg, FRG.
Marienhagen
J
J
Scheubel
R
R
Saptogino
A
A
Bakker
W H
WH
Breeman
W A
WA
Wolf
F
F
D007516:Adenoma, Islet Cell / Q000737:chemistry / Q000000981:diagnostic imaging* / Q000556:secondary; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D005260:Female; D006801:Humans; D007457:Iodine Radioisotopes; D008113:Liver Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D008297:Male; D008875:Middle Aged; D015282:Octreotide; D010190:Pancreatic Neoplasms / Q000737:chemistry / Q000000981:diagnostic imaging*; D017981:Receptors, Neurotransmitter / Q000032:analysis*; D017481:Receptors, Somatostatin; D013004:Somatostatin / Q000032:analysis*; D015899:Tomography, Emission-Computed, Single-Photon
D007457:Iodine Radioisotopes; D017981:Receptors, Neurotransmitter; D017481:Receptors, Somatostatin; D013004:Somatostatin; D015282:Octreotide