(also known as the Roser-Nélaton line
) is a theoretical line drawn from the anterior superior iliac spine
to the tuberosity
of the ischium
It was named for German surgeon and ophthalmologist Wilhelm Roser and French surgeon Auguste Nélaton.
Normally the greater trochanter
of the femur
lies in this line, but in cases of iliac joint dislocation
of the hip
of the neck of the femur the trochanter is felt above the line.