Midfoot and backfoot deformities are well described in children with Cerebral palsy. However, data regarding forefoot deformities in Cerebral palsy remain scarce in a population were foot deformities are the most frequent musculo-skeletal deformities.

Foot deformities are the most frequent musculo-skeletal deformities in children with Cerebral palsy. Pain starts in the foot, especially during gait in Cerebral Palsy Children (GMFCS I and II) and induce gait limitations, balance disorders, wounds, aesthetic disorders and difficulties to support shoes.

Metatarsus Adductus is the most common foot deformity in children with or without disorder, occuring on 1-2/1000 births. In 4 to 14% of the children, evolution is not favorable at 5 years. In that case, the diagnostic of Cerebral palsy have to be considered.

Inclusion Criteria:

• Child who benefit a standardised clinical evaluation before a 3D Gait Analysis with forefoot deformity measure
• Child age less than 18 years old
• Child with left or right unilateral cerebral palsy
• Walking child ( GMFCS score I, II or III)
• In case of several 3D Gait Analysis for the child: the 3D gait analysis was chosen first before any local spasticity treatment with botulinic toxin injection or the 3D gait evaluation the more far from local spastica treatment with botulinic toxin injection was chosen in second .

Exclusion Criteria:

• Hemiplegia due to another etiology
• History of lower limb or foot surgery before the clinical evaluation
• Local spasticy treatment with botulinic toxin injection less than 3 months before the clinical evaluation
• Participation refusal

Walking child with unilateral Cerebral Palsy who benefit of a 3D Motion Analysis on the motion analysis laboratory in Brest, France, between august 2012 and may 2017.

All collected data that underlie results in a publication

Data will be available beginning three years and ending fifteen years following the final study report completion

Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement.