Displaced epiphyses are common in severe forms of renal osteodystrophy and are the result of hyperparathyroidism.Displacement represents pathologic metaphyseal fractures through bone weakened by pronounced osteoclastic resorption.Almost any bone may be the site of metaphyseal erosions and displaced epiphyses, but the proximal femur is most typically affected.Metaphyseal fractures are not peculiar to renal osteodystrophy, but are an expression of the bone disease of hyperparathyroidism.