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New diagnostic and therapeutic techniques show potential for patients with metastasized melanoma
Date:1/7/2014

es. Thus, 123I -BZA2 could be theoretically used for the diagnosis of melanoma metastases," said Florent Cachin, MD, PhD, lead author of the study. "However, given its low sensitivity due to the high proportion of non-pigmented lesion in the natural course of metastatic melanoma, 123I- IBZA2 cannot be used for melanoma staging. Such results could appear discouraging, but the concept of melanin targeting may offer a real opportunity for therapy."

In the study "Radiopharmaceutical Therapy of Patients with Metastasized Melanoma with the Melanin-Binding Benzamide 131I-BA52," the first use of a melanoma-seeking agent for therapeutic application was analyzed. Researchers used a theranostic approach in which the same molecule was given first as a diagnostic isotope (123I-BA52) to identify the patients possibly profiting from therapy, and then as a therapeutic radiopharmaceutical (131I-BA52) for those patients who would benefit. Twenty-six patients were imaged with 123I-BA52, and nine patients were selected for therapy with 131I-BA52.

Some of the patients treated with 131I-BA52 were found to have a survival rate of more than two years. Researchers also found that higher treatment doses would have been tolerated in these patients, as only moderate side effects were observed. "We believe that the tracer could be useful in the setting of a combination therapy in patients with metastasized melanoma, especially when applied in earlier stages of the disease where the melanin production is higher as compared to later stages of the disease," noted Uwe Haberkorn, MD, lead author of the study.

Even though new treatments are now available, the prognosis for patients with metastatic melanoma remains very poor. "Innovative strategies are necessary to improve patients' survival. Research focused on innovating targeted-therapy reflects modern oncology, as new theranostic concepts. This strategy nicely illustrates the future of nuclear medicine oncology," said
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Contact: Susan Martonik
smartonik@snmmi.org
703-652-6773
Society of Nuclear Medicine
Source:Eurekalert

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