What is the primary anatomical change associated with Madelung deformity?

The primary anatomical change associated with Madelung deformity is the alterations in the radius, ulna, and carpal bones. This condition is characterized by a growth disturbance that affects the normal development of the wrist bones, particularly leading to the volar or palmar angulation of the distal radius and alterations in the shape and structure of the ulnar head. This results in a distinct appearance of the forearm and wrist, often leading to functional impairments.

These changes can result in limited wrist mobility and may be associated with pain, specifically in children and adolescents who experience the condition. Understanding the involvement of these specific bone structures is critical for diagnosis and formulating an appropriate treatment plan.

Other potential changes in the wrist area, such as osteoporosis or increased bone density, are not characteristic of Madelung deformity. Ankylosis refers to joint stiffness or immobility due to fusion, which is also not a primary feature of this condition.