[A new surgical method in malignant tumors of the ilium].

During the growth period the triradiate cartilage forms a barrier to the intraosseous tumor growth. It is then surgically possible to remove the ilium at the triradiate cartilage and leave more than 2/3 of the acetabulum. After transposition of the remaining acetabulum to the lateral side of the sacrum the hip joint can be preserved with a very good functional result.