Avascular necrosis is the death of bone tissue due to a lack of blood supply. (From the Mayo Clinic)
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Femoral Anteversion is a condition in which the femoral neck leans forward with respect to the rest of the femur. This causes the lower extremity on the affected side to rotate internally (i.e. the knee and foot twists towards the midline of the body). (From John Hopkins Medicine)
Legg-Calve-Perthes disease occurs when blood supply is temporarily interrupted to the ball part (femoral head) of the hip joint. Without sufficient blood flow, the bone begins to die. (From the Mayo Clinic)
Slipped capital femoral epiphysis (SCFE) is an unusual disorder of the adolescent hip. The ball at the upper end of the femur (thigh bone) slips off in a backward direction. This is due to weakness of the growth plate. Most often, it develops during periods of accelerated growth, shortly after the onset of puberty. (From the American Academy of Orthopaedic Surgeons)
A Subcapital Fracture is an intracapsular fracture of the neck of the femur, at the point where the neck of the femur joins the head. (From mediLexicon)
Intertrochanteric Fractures occur between the neck of the femur and a lower bony prominence called the lesser trochanter. Subtrochanteric Fractures occur below the lesser trochanter, in a region that is between the lesser trochanter and an area approximately 2 1/2 inches below. (From the American Academy of Orthopaedic Surgeons)