The primary basis for diagnosing acute appendicitis includes the following three aspects:
1. Medical history. The classic symptom of appendicitis is migratory right lower quadrant abdominal pain. Initially, the pain manifests in the upper abdomen, gradually shifts, and eventually localizes in the right lower quadrant, progressively intensifying.
2. Physical examination. There will be significant tenderness at McBurney's point in the right lower quadrant. In cases of suppurative appendicitis, patients may also exhibit rebound tenderness and muscle rigidity.
3. Auxiliary tests. Blood tests will show a marked increase in the proportion of white blood cells and neutrophils.