Third trochanter

Third trochanter

The third trochanter is a bony prominence that is found occasionally in humans on the femur, or thigh bone. It is more commonly seen in other animals, such as horses and apes.

Etymology

The term "trochanter" comes from the Ancient Greek word "τροχαντήρ" (trokhanter), which means "runner". The "third" in "third trochanter" refers to its position in relation to the other two trochanters on the femur, the greater trochanter and the lesser trochanter.

Anatomy

The third trochanter is located on the superior border of the gluteal tuberosity, and faces laterally, or away from the midline of the body. It serves as the point of insertion for the gluteus maximus muscle, one of the major muscles of the hip.

Clinical significance

The presence of a third trochanter is not usually of clinical significance, but it can be mistaken for a bone tumor or fracture on an X-ray. It can also be a site of tendinitis due to overuse or strain of the gluteus maximus muscle.

Related terms

• Greater trochanter
• Lesser trochanter
• Gluteal tuberosity
• Gluteus maximus muscle
• Tendinitis

See also

• List of bones of the human skeleton
• Femur

Third trochanter Resources
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