Foot Ankle Int. 2007 May;28(5):569-74. Treatment of severe, painful pes planovalgus deformity with hindfoot arthrodesis and wedge-shaped tricortical allograft.correlation is controversial. Flexible pes planovalgus with a tight heel cord; Rigid flatfoot & tarsal coalition (least common). no correction of hindfoot valgus with .Chicago Podiatric Surgeons is dedicated to providing the best possible podiatric care for your patients. this care includes answering patient questions and .A flat foot is when the plantar arch is completely collapsed. Usually hereditary in nature, this foot type can be problematic in the short and long term.J Pediatr Orthop B. 2014 Sep;23(5):400-5. doi: 10.1097/BPB.0000000000000073. Pes planovalgus deformity in children with cerebral palsy: review article.