Pes anserinus is general tendon entrapment on three muscles – sartorius, gracilis and semitendinosus. They start from different parts of the pelvis and thigh, but come together and attach on the inside of the tibia (below the knee). The clip places this within “Muscular pains in the hip and knee” so it is easier to understand what is happening in the area, not only where symptoms are felt.
