Test results further modify the probabilities of different diagnoses (post-test probability). For example, the table Hypothetical Differential Diagnosis and Pre-Test and Post-Test Probabilities shows how the additional findings that the hypothetical patient had leg pain and swelling and a normal ECG and chest x-ray modify diagnostic probabilities—the probability of acute coronary syndrome, dissecting aneurysm, and pneumothorax decreases, and the probability of pulmonary embolism increases.