[Treatment of the deformities associated with hypoplasia or agenesis of the sacral bone].

On the basis of follow-up of 5 children treated because of the deformities associated with sacral agenesis or hypoplasia as well as on the literature the authors came to the conclusion that congenital dislocation of the hip, clubfoot and flatfoot are the most common. The aim of the treatment is to prepare the child for walking before the end of the first year of life. Since the deformities mentioned are resistant to conservative treatment they require a very sophisticated surgery with the constant adjustment of the operating plan in every stage of the management. The type of hip surgery should be selected individually.