In the United States and other countries, one of the primary causes of medical errors in pediatric patients is the misdiagnosis of hip dysplasia. Thred diagnostic forms are described in children.

We consider that the following diagnostic algorithm should be applied: clinical assessment of both hips at birth, repeated clinical examination once a month to six months, ultrasonography from the sixth week to the fourth month performed by an experienced pediatric operator, in the event of doubt or unavailable programmed controls, radiography of both hips at the fourth month.

We present nine cases of hip dysplasia which illustrate this diagnostic approach.