American Family Physician
https://pubmed.ncbi.nlm.nih.gov/?myncbishare=dukemlib&dr=abstract&otool=dukemlib&term=30215950
Right lower quadrant pain, abdominal rigidity, and periumbilical pain radiating to the right lower quadrant are the best findings that point to a diagnosis of appendicitis. There are several scoring systems available that help to risk stratify patients.