Shih, Yin-ChuanYin-ChuanShihCHUI-CHIA FARNWang, Chen-ChieChen-ChieWangWang, Chung-LiChung-LiWangPEI-YU CHEN2023-06-202023-06-202022-041071-10071944-7876https://scholars.lib.ntu.edu.tw/handle/123456789/632892Lateral column lengthening (LCL), originally described by Evans, is an established procedure to correct stage II adult acquired flatfoot deformity (AAFD). However, the relative position between the facets is violated, and other problems may include nonunion, malunion, and calcaneocuboid (CC) joint subluxation. Herein, we report a modified extra-articular technique of LCL with hockey-stick osteotomy, which preserves the subtalar joint as a whole, increases bony apposition to enhance healing ability, and preserves the insertion of the calcaneofibular ligament to stabilize the posterior fragment to promote adduction of the forefoot.enadult acquired flatfoot; extra-articular osteotomy; lateral column lengtheningjournal article10.1177/10711007211051359347388492-s2.0-85118572016https://api.elsevier.com/content/abstract/scopus_id/85118572016