Tonsils are designed to trap germs, which also makes them prone to infection. Learn what causes viral and bacterial tonsillitis and how doctors tell them apart.
Color blindness stems from genetic and biological factors that affect how your eyes process light. Learn what actually causes different types of color vision deficiency.
Multiple endocrine neoplasia causes tumors in hormone-producing glands. Learn how the four types differ, what symptoms to watch for, and what a diagnosis means in practice.