<prompt> Which of the following statement is false with respect to Pes planus ?Obliteratedlost medial longitudinal arch leads to Pes planus .If heel goes to lateral detion it is called Plano valgus .Rigid type on Jacks test often require conservative intervention .Most common cause is idiopathic .  <response>: Pes planus or Flat feet is a postural deformity due to medial longitudinal arch flatening. MC cause-idiopathic Types on basis of Jacks test 1Flexible arch disappears when placed on ground comes back when foot is lifted off. Mx - conservative 2 Rigid Flat on both ground when lifted . Due to congenital veical talus RA infection or tarsal coalition AD - talocalcaneal and calcaneo navicular or tibialisposterior dysfunction -They often require surgical intervention Congenital veical talus Rocker-bottom foot Treatment as per age and severity: Children 1 to 4 years old- Open reduction and realignment of the talonavicular and subtalar joints. Children 4 to 8 years old- Open reduction and soft-tissue procedures combined with extraar-ticular subtalar ahrodesis. Children 12 years old or older- Triple ahrodesis for permanent correction of the deformity. 