| Abbreviation | Definition |
|---|---|
| APOS | American Psychosocial Oncology Society |
| APOT | Amplification of Papillomavirus Oncogene Transcripts |
| ARMS | Alveolar RhabdoMyoSarcoma |
| AROI | Association of Radiation Oncology of India |
| ARRO | Association of Residents in Radiation Oncology |
| ART | Adaptive Radiation Therapy |
| ART | Analyze, Revitalize, and Target |
| ARV | Associate Remote Viewing |
| AS | Adeno-Squamous carcinoma |
| AS | AngioSarcoma |
| ASCO | American Society for Clinical Oncology |
| ASCO | American Society of Clinical Oncology |
| ASCO | Ametrican Society of Clinical Oncology |
| ASH | American Society for Hematology |
| ASNO | Asian Society for Neuro Oncology |
| ASNO | Asian Society of Neuro Oncology |
| ASPO | American Society of Preventive Oncology |
| ASPS | Alveolar Soft Part sarcom |
| ASR | Age Standardised Rate |
| ASTRO | American Society for Therapeutic Radiology and Oncology |