Abstract | UNLABELLED: MATERIAL AND METHODS: Thirty (30) patients, 20 females and 10 males, 22-83 years of age (mean, 52.7) with the diagnosis of MTC in different stages of the disease (preoperative, postsurgery, remission, recurrence, or metastatic disease) were included in this study. Before surgery, in all patients serum calcitonin concentrations were elevated. The diagnosis of MTC was confirmed in all cases by histopathology of the removed tumor and immunohistochemical staining giving positive reactions for calcitonin and chromogranin A. Imaging studies using (99m)Tc- EDDA/HYNIC-TOC and a new minigastrin analog, (99m)Tc- EDDA/HYNIC-(D) Glu-octagastrin, were performed in each patient and the results compared with each other and with other imaging methods. Scans of the whole body, head, neck, and chest were performed 2 and 4 hours after injections of the tracer, 500-600 MBq in each case, using a double-head Varicam (Elscint, Israel) gamma camera. RESULTS: (99m)Tc- EDDA/HYNIC-TOC detected somatostatin receptor-positive lesions in 20 patients with MTC, whereas (99m)Tc- EDDA/HYNIC-(D) Glu-octagastrin displayed gastrin receptors in 11 patients. In 9 cases, the scans were positive in both methods, although in 2 cases different pathologic foci were visualized. In 12 cases, only (99m)Tc- EDDA/HYNIC-TOC scintigraphy was positive, whereas in 3 other cases only (99m)Tc- EDDA/HYNIC-(D) Glu-octagastrin revealed pathologic lesions. CONCLUSIONS: Scintigraphy using (99m)Tc-HYNIC-TOC permits the visualization of somatostatin receptor-positive MTC in the majority of cases. The new gastrin analog, (99m)Tc-HYNIC-(D)Glu-octagastrin, is well tolerated, shows no renal retention, and in some cases of MTC, provides additional information on the expression of gastrin receptors. However, inferior quality of octagastrin scans indicates the need for further improvement of this radiopeptide.
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Authors | Jerzy Kosowicz, Renata Mikołajczak, Rafał Czepczyński, Katarzyna Ziemnicka, Maria Gryczyńska, Jerzy Sowiński |
Journal | Cancer biotherapy & radiopharmaceuticals
(Cancer Biother Radiopharm)
Vol. 22
Issue 5
Pg. 613-28
(Oct 2007)
ISSN: 1084-9785 [Print] United States |
PMID | 17979564
(Publication Type: Clinical Trial, Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- 6-hydrazinopyridine-3-carboxylic acid
- Gastrins
- Glu-Octagastrin
- Hydrazines
- Indium Radioisotopes
- Nicotinic Acids
- Organotechnetium Compounds
- technetium 99m EDDA-HYNIC-Tyr(3)-octreotide
- EDDA
- Edetic Acid
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Topics |
- Adult
- Aged
- Aged, 80 and over
- Animals
- Carcinoma, Medullary
(diagnosis, diagnostic imaging, radiotherapy)
- Edetic Acid
(analogs & derivatives, chemistry)
- Female
- Gastrins
(chemistry, pharmacokinetics)
- Humans
- Hydrazines
(chemistry)
- Indium Radioisotopes
(chemistry)
- Male
- Mice
- Mice, Inbred BALB C
- Middle Aged
- Neoplasm Metastasis
- Neoplasm Recurrence, Local
(diagnosis, diagnostic imaging, prevention & control)
- Nicotinic Acids
(chemistry)
- Organotechnetium Compounds
(chemical synthesis, pharmacokinetics)
- Radionuclide Imaging
(methods)
- Sensitivity and Specificity
- Thyroid Gland
(metabolism, pathology, radiation effects)
- Thyroid Neoplasms
(diagnosis, diagnostic imaging, radiotherapy)
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