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  • Title: Multicenter study of immunoscintigraphy with radiolabeled monoclonal antibodies in patients with melanoma.
    Author: Siccardi AG, Buraggi GL, Callegaro L, Mariani G, Natali PG, Abbati A, Bestagno M, Caputo V, Mansi L, Masi R.
    Journal: Cancer Res; 1986 Sep; 46(9):4817-22. PubMed ID: 3731128.
    Abstract:
    A multicenter study was performed to analyze the efficacy of 99mTc- and 111In-labeled F(ab')2 fragments of monoclonal antibody (MoAb) 225.28S (reactive with a high molecular weight melanoma associated antigen) to radioimage malignant lesions in patients with melanoma. A total of 254 melanoma patients, carrying 412 documented melanoma lesions, were studied in 10 nuclear medicine departments. A total of 377 lesions were visualized in 206 patients; in particular (a) 250 of 412 known lesions were visualized in 159 of 191 patients known to carry melanoma lesions; (b) 95 occult lesions were visualized in 61 patients of the same group; and (c) 32 lesions were visualized in 15 of 63 patients without diagnosed lesions. The melanomic nature of 101 of 127 radioimaged occult lesions was confirmed by clinical criteria and/or by additional laboratory investigations. These results indicate that immunoscintigraphy with radiolabeled F(ab')2 fragments of MoAb 225.28S can provide clinically useful information. Analysis of the variables influencing the outcome of immunoscintigraphy with 99mTc- and 111In-labeled F(ab')2 fragments of MoAb 225.28S confirmed the role of size, anatomic site, and level of high molecular weight melanoma associated antigen in melanoma lesions. Such analysis also showed, for the first time, the influence (a) of the isotope used to radiolabel the antibody fragments and (b) of the clinical stage of the patients. The present study has shown good agreement in the results obtained by the 10 nuclear medicine departments, suggesting that immunoscintigraphy with radiolabeled F(ab')2 fragments of MoAb 225.28S is a reliable procedure.
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