Written by Fred F. Ferri, MD, FACP, author of many best-selling books for primary care practice, Ferri's Best Test, 2nd Edition, equips you to quickly choose the most efficient and cost-effective diagnostic approach, including imaging or lab tests. Updates throughout, including more than 180 new tests...additional diagnostic modalities...and new algorithms...make this unique and user-friendly reference a must for determining which diagnostic tests to order. A portable, pocket-sized format allows for convenient consultation anytime, anywhere.