Co-morbidity

Number of patients (%)

Sequelae of hip arthritis, developmental dysplasia of the hip, Legg-Calvé-Perthes disease

9 (50)

Cerebral anoxic lesions

2 (11.1)

Ewing’s sarcoma

2 (11.1)

Gorlin’s syndrome

2 (11.1)

Osteogenesis imperfecta

1 (5.6)

Psychomotor deficiency

1 (5.6)