[Abduction fractures of the femur neck in adolescents].

Valgus fractures of the femoral neck during growth are a rarity. Four cases are reported, and, in addition, one patient from the literature. Three were treated by bed rest, two by primary screw fixation. Clinical results were good; there was no necrosis. In accordance with the experience with similar fractures in adults primary osteosynthesis is recommended in all cases to prevent secondary displacement. Decompression of the hip joint by aspiration should be done for diagnosis and for decompression of tension haemarthrosis.