Camurati-Engelmann disease is a rare autosomal dominant type of bone bone dysplasia. The hallmark of the disorder is the cortical thickening of the diaphyses of the long bones. Hyperostosis is bilateral and symmetrical and usually starts at the diaphyses of the femora and tibiae, expanding to the fibulae, humeri, ulnae, and radii. As the disease progresses, the metaphyses may be affected as well, but the epiphyses are spared. Sclerotic changes at the skull base may be present. The onset of the disease is usually during childhood and almost always before the age of 30. Most patients present with limb pain, muscular weakness, a waddling gait, and easy fatigability. Systemic manifestations such as anemia, leukopenia, and hepatosplenomegaly occur occasionally. [From OMIM]