The popliteal lymph nodes are behind the knee. Conditions such as infections and autoimmune conditions can cause swelling, but it is rarely due to cancer. Learn more.

Knee anatomy and common knee injuries Medically reviewed by Courtney L. Gilbert, PT, DPT, AIB VR/CON — Written by Kathleen Davis, FNP — Updated on May 9, 2025 Anatomy ...

A knee bursa, also known as a subcutaneous prepatellar bursa, aids with movement when we walk, run, stretch, or even cross our legs. A knee bursa basically functions as a cushion; ...

Anatomy of a human knee. Credit: Rasi Bhadramani/iStock/Getty Images Plus. Analysis of knee joints from adult human cadavers provides new insights into the functions of a ligament that helps ...