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111In-octreotide scintigraphy in oncology
E P Krenning1, D J Kwekkeboom, J C Reubi
1Department of Nuclear Medicine, University Hospital Dijkzigt, Rotterdam, The Netherlands.
Digestion
|January 1, 1993
Summary
A new radioactive tracer, 111In-octreotide, effectively visualizes various amine precursor and decarboxylation (APUD) tumors and other cancers. This diagnostic tool shows improved detection compared to older methods for carcinoids, glomus tumors, and lymphomas.
Area of Science:
- Nuclear Medicine
- Oncology
- Radiopharmacology
Background:
- Amine precursor and decarboxylation (APUD) tumors are visualized using [123I-Tyr3]-octreotide.
- Limitations of [123I-Tyr3]-octreotide include a short half-life and high abdominal radioactivity.
- A novel somatostatin analogue, [111In-DTPA-D-Phe1]-octreotide, was developed to overcome these limitations.
Purpose of the Study:
- To evaluate the efficacy of 111In-octreotide scintigraphy for in vivo visualization of various tumors.
- To compare the diagnostic performance of 111In-octreotide with conventional imaging techniques.
Main Methods:
- Intravenous injection of 111In-octreotide in patients with suspected or known tumors.
- Scintigraphic imaging to detect radioactivity accumulation.
- Comparison of findings with histopathology and conventional imaging.
Main Results:
- High visualization rates for APUD-cell-derived tumors including gastrinomas, insulinomas, glucagonomas, apudomas, carcinoids, glomus tumors, medullary thyroid carcinomas, small cell lung carcinomas, and pituitary adenomas.
- Successful visualization of non-APUD tumors such as breast cancer, lymphomas, and granulomas.
- 111In-octreotide scintigraphy identified more tumor sites than conventional methods in patients with carcinoids, glomus tumors, granulomas, and lymphomas.
Conclusions:
- 111In-octreotide scintigraphy is a valuable tool for diagnosing a wide range of neuroendocrine and other tumors.
- The renal excretion profile and improved imaging characteristics make 111In-octreotide a superior alternative to [123I-Tyr3]-octreotide.
- This technique enhances tumor detection and staging, offering advantages over conventional imaging.