| Abbreviations | Meaning |
 | ATLS | Acute Tumor Lysis Syndrome; Advanced Tool For Learning Anatomical Structures; Advanced Trauma Life Support |
| MRXA | X-linked Mental Retardation-aphasia Syndrome |
| MISHAP | Microcephalus-imperforate Anus-syndactyly-hamartoblastoma-abnormal Lung Lobulation-polydactyly [syndrome] |
| MOMX | Macroorchidism-marker X Chromosome [syndrome] |
| SLS | Stein-Leventhal Syndrome |
| CNFS | Craniofrontonasal Syndrome |
| CRS | Chinese Restaurant Syndrome |
| LEMS | Lambert-Eaton Myasthenic Syndrome |
| RSTS | Retropharyngeal Soft Tissue Space; Rubinstein-Taybi Syndrome |
| PIS | Pharmacy Information System; Preinfarction Syndrome; Primary Immunodeficiency Syndrome; Primary Index Score; Provisional International Standard |
| AS | Artificial Sweetener; Aseptic Meningitis; Asparagine Synthetase; Asperger Syndrome; Assisted Suicide; Astigmatism; Asymmetric; Atherosclerosis |
| PWS/AS | Prader-Willi/Angelman Syndromes |
| ALTS | Acute Lumbar Trauma Syndrome |
| ABB | Albright-Butler-Bloomberg [syndrome]; American Board Of Bioanalysis |
| ALTS | Acute Lumbar Traumatic Sprain Or Syndrome |
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