What is a common feature in the hands, wrists, and feet of a newborn with arthrogryposis?

In newborns with arthrogryposis, the presence of contractures is a distinguishing feature. Arthrogryposis, also known as arthrogryposis multiplex congenita, is characterized by joint contractures, which result from a range of developmental problems, including limited movement in utero. These contractures can affect multiple joints, leading to a stiffening or fixation of the joints at various angles.

In the case of the hands and feet, this manifests as reduced range of motion and abnormal positioning, which can significantly impact the infant's mobility and ability to function. The implications of these contractures are profound, as they may require early intervention through therapies or surgical options to improve joint function and mobility.

While other options such as hyperflexion or color changes could be relevant in various conditions, they do not specifically highlight the hallmark characteristics of arthrogryposis. Amputations are also unrelated to the condition, as arthrogryposis primarily involves joint deformities rather than the loss of limbs. Therefore, contractures are the key feature that encapsulates the clinical presentation of newborns with this condition.