Mesomelic dysplasia with periosteal thickening, radio-humeral dislocation, osteoporosis and multiple fractures

We report a boy with a new form of mesomelic dysplasia characterised by short stature, multifocal periosteal thickening, radio-humeral dislocation, osteoporosis and multiple fractures with minimal trauma. Electrophoresis of fibroblast collagens detected defects in type III and type V collagen. Conclusion Bone dysplasias presenting with osteopenia, abnormal trabecular pattern, bone fragility, and periosteal thickening suggest a collagenopathy. A possible collagen defect requires biochemical investigations.