Pes anserinus ("goose foot") refers to the conjoined tendons of three muscles of the thigh.

Pes anserinus inserts onto the anteromedial (front and inside) surface of the proximal tibia.

The name "goose foot" arises from the three-pronged manner in which the conjoined tendon inserts onto the tibia.

If the bursa underlying the tendons of the sartorius, gracilis, and semitendinosus gets irritated from overuse or injury, a person can develop this ailment.

[5] The name "goose foot" arises from the three-pronged manner in which the conjoined tendon inserts onto the tibia.