BMPR1A and neoplasm: BMPR1a-Fc augmented trabecular and cortical bone parameters in non-tumour and myeloma-bearing mice (Fig. 3b–e), but had no effect on the number of lytic bone lesions (control: 24.11 ± 5.278; BMPR1a-Fc: 23.90 ± 5.384, mean ± SD).