3D reconstruction CT scan in a-20-years-old-girl showed severe flattening, fusion, shrinkage and compression of the dissolved thoracic spine T3-T9. Vanishing bone extended to involve the right shoulder joint resulted in total drop of the right upper limb (arrow). The combination of vertebral body osteolysis and unilateral right shoulder joint destruction resulted in the development of progressive kyphoscoliosis of 90° Cobbs angle. Note the dislocated right clavicle.