PMID: 9170426May 1, 1997Paper

Imaging prostate cancer with technetium-99m-7E11-C5.3 (CYT-351)

Journal of Nuclear Medicine : Official Publication, Society of Nuclear Medicine
V U ChengaziK E Britton

Abstract

To evaluate the performance of the 99mTc-labeled monoclonal antibody CYT-351 in visualizing prostate cancer, radioimmunoscintigraphy (RIS) was performed in 35 patients. Antibody (0.5 mg) labeled with 600 MBq 99mTc was injected intravenously after obtaining informed consent. Planar and SPECT imaging was performed at 10 min and 6-8 and 22-24 hr postinjection. The scans were evaluated for visualization of the primary focus or local recurrence, extraprostatic invasion, lymph node involvement and uptake in bone and soft tissue metastases. Thirty-six studies in 35 patients were performed. In 13/14 evaluable studies with clinically localized prostate cancer, RIS had a true-positive rate of 92% (12/13). In eight patients with previous incidental carcinoma detected during transurethral resection undertaken for clinically benign disease, there were 86% true-positive results (6/7) and one true-negative result, which were confirmed by systematic needle biopsies. In six patients with evidence of local recurrence after a previous radical prostatectomy, the true-positive rate was 100% (6/6), which was confirmed by raised or rising prostate-specific antigen levels (PSA) and/or by biopsy. In the eight patients with known metastases, the disease...Continue Reading

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