In talocalcaneal coalition management is controversial so in this study the invstigators try to compare techniques other than coalition excision only or fusion only by using two types of intervention including first coalition excision and multiple corrective osteotomies according to deformity as evans ,medial displacement calcaneal osteotomy and cotton osteotomy vs coalition excision and arthroereisis the investigators compare functional and radiological outcomes and complication to provide the best management for these patients .
the investigators compare the corrective osteotomies vs arthroereisis in management of talcalcaneal coalition in adolescents as regard the outcome to provide the best intervention for the patient