| AAS | Adult Appendicitis Score |
| AIR | Appendicitis Inflammatory Response |
| ANC | Absolute Neutrophil Count |
| AUC | Area Under the Curve |
| BMI | Body Mass Index |
| CI | Confidence Interval |
| cfDNA | cell-free DNA |
| CP | Calprotectin |
| CRP | C-Reactive Protein |
| CT | Computed Tomography |
| ED | Emergency Department |
| EDTA | Ethylenediaminetetraacetic Acid |
| ELISA | Enzyme-Linked Immunosorbent Assay |
| H3Cit | Citrullinated histone H3 |
| IQR | Interquartile Range |
| LRG1 | Leucine-Rich Alpha-2-Glycoprotein 1 |
| MPO | Myeloperoxidase |
| MPV | Mean Platelet Volume |
| NE | Neutrophil Elastase |
| NET | Neutrophil Extracellular Trap |
| NLR | Neutrophil-to-Lymphocyte Ratio |
| OR | Odds Ratio |
| PCT | Procalcitonin |
| PLR | Platelet-to-Lymphocyte Ratio |
| ROC | Receiver Operating Characteristic |
| STARD | Standards for Reporting Diagnostic Accuracy Studies |
| WBC | White Blood Cell |
| WSES | World Society of Emergency Surgery |