| Abbreviation | Definition |
|---|---|
| LRF | Leukemia Research Fund |
| LRFA | Lymphoma Research Foundation of America |
| LRO | Leeward Radiation Oncology Cancer Treatment, |
| LST | Limb Salvage Treatment |
| LTRA | LeukoTriene Receptor Antagonist |
| LVEF | Left Ventricular Ejection Fraction - a heart function test |
| LVSF | Left Ventricular Shortening Fraction - a heart function test |
| LX | Lumpectomy |
| M | Meter |
| M/H | Medical history |
| MAB | Monoclonal Anti-Body |
| MAB-MAB | Monoclonal antibody |
| MAD | Melanoma Awareness Day |
| MAF | Macrophage Activating Factor |
| MAGE | Melanoma AntiGEn |
| MAGIC | Mucosta Against Gastric Inflammation Carcinogenesis |
| MALT | Mucosa Associated Lymphoid Tumor |
| MALT | Mucosal Associated Lymphoid Tissue |
| MASCC | Mulinational Association of Supportive Care in Cancer |
| MBBL | Multiple Benign Breast Lesions |