Intensification of 111In-DTPA-octreotide scintigraphy by means of pretreatment with cold octreotide in small cell lung cancer

Small cell lung cancer (SCLC) expresses somatostatin receptors that can be traced with 111In-DTPA-octreotide scintigraphy. Although this technique is currently employed for staging and follow-up of neuroendocrine tumors of the gastrointestinal tract, its role in the clinical work-up of SCLC is at pr...

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Veröffentlicht in:Lung cancer (Amsterdam, Netherlands) Netherlands), 1997-07, Vol.17 (2), p.231-238
Hauptverfasser: Soresi, E., Invernizzi, G., Boffi, R., Possa, M., Bombardieri, E., Ciavarella, G.Petracca, Liuzzi, A.
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Sprache:eng
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Zusammenfassung:Small cell lung cancer (SCLC) expresses somatostatin receptors that can be traced with 111In-DTPA-octreotide scintigraphy. Although this technique is currently employed for staging and follow-up of neuroendocrine tumors of the gastrointestinal tract, its role in the clinical work-up of SCLC is at present under discussion. A better imaging contrast is desirable and recent reports suggest that this aim could be achieved by pretreatment with cold octreotide. Here we report on the results of 111In-DTPA-octreotide scintigraphy in 12 SCLC patients carried out before and after octreotide treatment. The patients were treated for 7 days with octreotide 200 μg three times a day s.c. Uptake was studied at 5 h with whole body planar and SPET imagings. In all cases studied, pretreatment with octreotide was followed by enhancement of tumor imaging. In one patient a better contrast of the lesions was found at the parenchymal and mediastinal levels as well as at brain level, allowing a clear definition of otherwise questionable metastases. After octreotide treatment, a decrease in background uptake in the subdiaphragmatic area was observed in most cases, allowing a better imaging of liver metastases. The enhancement effect was confirmed by semiquantitative analysis of scintigraphic uptake. Taken together, our results seem t indicate that cold octreotide enhancement can improve 111In-DTPA-octreotide imaging and optimize its clinical role in SCLC.
ISSN:0169-5002
1872-8332
DOI:10.1016/S0169-5002(97)00657-0