| Abbreviation | Definition |
|---|---|
| BLBC | Basal like breast cancer |
| BMBX | Bone Marrow Biopsy (extraction) |
| BMCT | Bone Marrow Cancer Trust |
| BMJFW | Boston Marathon Jimmy Fund Walk (cancer-awareness fundraising walk) |
| BNCA | Boston North Cancer Association |
| BNCR | Botswana National Cancer Registry |
| BNCR | Bulgarian National Cancer Registry |
| BOBC | Boot Out Breast Cancer |
| BOCP | Breast and Ovarian Cancer Program |
| BOCS | Breast and Ovarian Cancer Susceptibility |
| BPDCN | Blastic plasmacytoid dendritic cell neoplasm |
| BRA | Breast Reconstruction Awareness |
| BRCA1 | Breast Cancer 1 |
| BRCA2 | Breast Cancer 2 |
| BRCC | Blue Ridge Cancer Care |
| BSCRN | Brighton and Sussex Cancer Research Network |
| CAA | Cancer Arthritis Artery |
| CACA | China Anti Cancer Association |
| CACV | Cancer Action Coalitiion of Virginia |
| CACV | Cancer Action Coalition of Virginia |