[Hemarthrosis of the knee joint in children (author's transl)].

After injury of the knee resulting in hemarthros without any bone involvement the follow up examination showed in one third of the 28 children minor subjective complaints or minor physical or radiological abnormalities. Consistent with the literature we concluded, the routine arthroscopy after hemarthros of unknown origin in childhood is not indicated. If there are any signs of a possible serious traumatic lesion of the knee which cannot be diagnosed physically or radiologically arthroscopy is still necessary.