The 700 laboratory and diagnostic tests in this reference are divided into 12 sections according to the body fluid analyzed or the type of scan performed. Each entry explains the basic pathophysiology behind the test, summarizes patient care and the procedure, and lists normal findings, critical values, indications, contraindications, potential complications, interfering factors, the clinical significance of test results, and related tests. The fourth edition adds 30 studies including breast cancer genomics, intravascular ultrasound, computed tomography of the heart, and platelet closure time.