Which condition presents with back pain, stiffness, and progressive kyphosis in adolescents, along with X-ray findings of epiphyseal plate disturbance?

Scheuermann's disease is characterized by back pain, stiffness, and the development of a rounded back, known as kyphosis, in adolescents. This condition arises due to a disturbance in the growth of the vertebrae, particularly affecting the epiphyseal plates during the adolescent growth spurt. The X-ray findings typically demonstrate abnormal growth patterns in the vertebrae, such as wedging of the thoracic vertebrae, which leads to the characteristic postural deformity.

The presence of symptomatic back pain and rigidity aligns with the structural and growth abnormalities seen in Scheuermann's disease, distinguishing it from other conditions that may also produce back pain but lack the same patterns of vertebral change. The kyphosis that develops is progressive, emphasizing the need for early recognition and potential intervention to manage the development of spinal deformity.

In contrast, osteogenesis imperfecta primarily affects bone quality and strength rather than leading to a specific kyphotic posture resulting from epiphyseal plate disturbances. Kyphosis due to postural issues is generally related to poor habits and may not present with the same severe deformity or pain as Scheuermann's disease. Thoracic outlet syndrome involves compression of nerves or blood vessels in the thoracic outlet, leading