This comprehensive encyclopedia of over 500 diseases, conditions, with over 800 illustrations. Created by the faculty at Harvard Medical School, entries offer a description, symptoms, diagnosis, prevention tips, treatments, prognosis, and when to call a professional.
As a service to our readers, Harvard Health Publishing provides access to our library of archived content. Please note the date of last review on all articles. No content on this site, regardless of date, should ever be used as a substitute for direct medical advice from your doctor or other qualified clinician.