A guide to the management of paediatric pes planus.

Background: Flat foot (pes planus) describes a reduction or absence of the medial longitudinal arch (MLA) of the foot, with or without additional deformities of the foot and ankle. Flat feet are relatively common in childhood, affecting up to 14% of children. Flexible flat feet can be part of a normal developmental profile, and foot arches usually develop with age, although there is a wide range of normal variation.