[Adult acquired flatfoot deformity-operative management for the early stages of flexible deformities].

Flexible adult acquired flatfoot deformity includes a wide spectrum of fore- and hindfoot pathologies and remains a complex clinical challenge. Clinical history, inspection and accurate physical examination are paramount for diagnosis. Early stages of flexible adult acquired flatfoot deformity present with increased hindfoot valgus and medial arch collapse. Operative management typically consists of an open medializing calcaneal osteotomy and an augmentation of the insufficient posterior tibial muscle using a flexor digitorum longus tendon transfer. New surgical techniques and a deeper understanding of pathophysiology may change traditional treatment pathways.