Phase II clinical evaluation of AZQ in renal cell carcinoma.

Twenty-two patients with advanced measurable renal cell carcinoma were treated with AZQ 20 mg/m2 weekly for 4 weeks, followed by a 2-week rest. No complete or partial responses were observed among 15 fully evaluable patients. Stabilization was observed in eight individuals (range 8-27 weeks with a median of 12.5 weeks). Toxicity was primarily reversible myelosuppression. We conclude that AZQ administered at this dose and schedule has no significant activity against advanced renal cell carcinoma.