A phase II study of SGN-30 in cutaneous anaplastic large cell lymphoma and related lymphoproliferative disorders

Purpose: An open-label, multicenter, phase II study was conducted to define the safety and antitumor activity of the monoclonal antibody SGN-30 in patients with CD30⁺ primary cutaneous anaplastic large cell lymphoma (pc-ALCL), lymphomatoid papulosis (LyP), or transformed mycosis fungoides (T-MF). Experimental Design: In the initial course (six doses), patients received i.v. SGN-30 every 3 weeks; eligible patients could receive two additional courses. The initial dose level of 4 mg/kg was increased to 12 mg/kg by protocol amendment. Results: The overall objective response rate [complete response (CR) + partial response (PR)] was 70% (16 of 23 patients): 10 patients achieved a CR and another 6 patients achieved a PR. Overall, clinical benefit of SGN-30, as assessed by achieving a response to therapy or stable disease (CR + PR + stable disease), was shown by 87% of patients during the study, including all patients with pc-ALCL or LyP and two thirds of patients with T-MF or with multiple clinical diagnoses. Nine of the 10 patients who achieved a CR and 5 of the 6 patients who achieved a PR were in remission at their follow-up evaluation (median duration, 84 days). Fifteen of 23 patients (65%) experienced at least one adverse event during the study, most of which were mild or moderate. Conclusions: SGN-30 was clinically active in 16 of 23 patients with heavily pretreated pc-ALCL, LyP, and T-MF and was well tolerated in this study.