Upon establishment of MM tumor growth (indicated by hIg level >10 μg/ml), 10 SCID-rab hosts engrafted with myeloma cells from 10 patients were treated with PTH for 4 weeks; an additional 10 matching SCID-rab hosts served as controls and were treated with saline for 4 weeks. The gene discussed is PTH; the disease is plasma cell myeloma.