Recalcitrant congenital knee dislocation: a case report of successful serial casting in a dysmorphic infant

INTRODUCTION Congenital knee dislocation (CKD) is a condition characterized by knee hyperextension with anterior displacement of the tibia in relation to the femur. It covers a wide spectrum of severity ranging from subluxation to dislocation. This is a rare condition with an incidence of one in 100,000 livebirths with higher frequency reported in the female population. It may occur in isolation but occurs more commonly in combination with other musculoskeletal anomalies such as developmental dysplasia of hip (DDH) and congenital talipes equinovarus (CTEV). Further investigation is always advocated because of possible association with conditions like arthrogryposis multiplex congenita, myelomeningocele, Marfan, Ehler-Danlos, and Larsen syndromes. The authors report a case of a dysmorphic newborn with bilateral CKD who was successfully treated with early manipulation and serial casting. The mother provided written informed consent for the use of data related to this case prior to publication. Institutional review board approval was not required for this case report.