What does "bilateral" refer to in medical terms?

In medical terminology, "bilateral" refers to both sides of the body or of a structure. When a condition or symptom is described as bilateral, it means that it affects corresponding areas on the left and right sides equally. For example, bilateral knee pain would indicate that the pain is present in both knees. This terminology is commonly used to provide clarity in diagnoses, treatments, and anatomical descriptions in a healthcare setting. Understanding this term helps healthcare professionals convey precise information about a patient's condition.