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Indium-111-DTPA-octreotide scintigraphy in patients with carcinoid tumor = Scintigrafija z indij-111-DTPA-oktreotidom pri bolnikih s karcinoidom
Težak, Stanko ...
Background. The aim of the study was the evaluation of clinical utility and comparison of 111 In-DTPA- octreotide receptor scintigraphy (SRS) with conventional imaging modalities (CIM) in the ...detection of carcinoid tumor. Patients and methods. Fourteen patients with pathohistologically proven diagnosis of carcinoid tumor and one patient with clinical suspicion of carcinoid tumor were investigated by SRS. SRS was performed for localization of primary tumor, recurrence or estimation of spread of the disease after CIM had been completed. Whole body scans and single photon emission computed tomography (SPECT) were acquired 6 and 24 h after the application of radiopharmaceutical. The intensity of nonspecific radiopharmaceutical uptake in the bowel was assessed semiquantitatively by a score using whole body scans. Results. The evaluation was done for patients and for tumor sites. The sensitivity, specificity, and positive and negative predictive values for patient evaluation were 89 %,100 %,100 % and 80 %, respectively for both CIM and SRS, whereas for tumor sites, these parameters were 69 % 100 %,100 % and 82 % for CIM, and 88%,100%,100% and 92 % for SRS. Intensity score of nonspecific 111In-octreotide bowel accumulation was 0.92 and 2.01 for 6 and 24h scans respectively (p < 0.01). Conclusion. 111In-octreotide scintigraphy should be included in the diagnostic algorithm for the patients with clinical suspicion of carcinoid and for the assessment of patients with proven carcinoid tumor.
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