Abstract
This prospective study compared 177Lu-ethylene diamine tetramethylene phosphonate (EDTMP) with 153Sm-EDTMP for painful skeletal metastases. Half of the 32 patients were treated with 177Lu-EDTMP and half with 153Sm-EDTMP, at 37 MBq/kg of body weight. Analgesic, pain, and quality-of-life scores (EORTC, Karnofsky, ECOG) and bone proliferation marker were used to examine efficacy. Hematologic toxicity was evaluated using NCI-CTCAE and compared between groups at baseline and each month till 3 mo after therapy. Pain relief was categorized as complete, partial, minimal, or none. Pain relief with 177Lu-EDTMP was 80%: 50% complete, 41.67% partial, and 8.33% minimal. Pain relief with 153Sm-EDTMP was 75%: 33.33% complete, 58.33% partial, and 8.33% minimal. The difference was not significant (P=1.000). Quality of life at 3 mo after therapy improved significantly in both groups as per ECOG score (P=0.014 and 0.005 for 177Lu-EDTMP and 153Sm-EDTMP, respectively), Karnofsky index (P=0.007 and 0.023 for 177Lu-EDTMP and 153Sm-EDTMP, respectively), and EORTC score (P=0.004 and <0.001 for 177Lu-EDTMP and 153Sm-EDTMP, respectively). Bone proliferation marker in responders of both groups dropped significantly (P=0.008 for 177Lu-EDTMP and P=0.019 for...Continue Reading
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