方形結節 - Tuberculum quadratum
The quadrate tubercle is a small tubercle found upon the upper part of the femur, that serves as a point of insertion of the quadratus femoris along with the intertrochanteric crest and the linea quadrata.
The size of the tubercle varies and it is not alway located on the intertrochanteric crest and that also adjecent areas can be part of the quadrate tubercel, such as the posterior surface of the greater trochanter or the neck of the femur.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
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