[Expert consensus on the clinical diagnosis and treatment of Congenital syndactyly (2025 Edition)].

Syndactyly is one of the most common congenital malformations of the hand/foot, characterized by varying degrees of soft tissue and/or skeletal fusion between adjacent fingers or toes. It may also occur alongside polydactyly, camptodactyly, brachydactyly, or congenital joint fusion. The heterogeneity in its clinical phenotypes and incomplete penetrance makes it challenging to establish clear diagnostic and treatment protocols/procedures. Conventionally, the management of syndactyly has mainly relied on clinical experience, with limited reference to cutting-edge genetic research and systematic treatment strategies. To standardize the diagnosis and treatment of syndactyly and update the treatment protocols, a consensus has been developed by experts from the Hand Plastic Surgery Committee of the Aesthetic and Plastic Surgeon Branch of Chinese Medical Doctor Association, Clinical Genetics Group of the Medical Geneticist Branch of Chinese Medical Doctor Association, Pediatric Plastic Surgery Group of Plastic Surgery Branch of Chinese Medical Association, and Assistive Devices Application Committee of the Chinese Rehabilitation Medicine Association, and leading universities and hospitals across China. This expert consensus, incorporating both clinical and genetic research, as well as recent international and domestic findings, aims to serve as a reference for clinicians.