Plain film imaging remains important for the diagnosis and surveillance of scoliosis, as well as for the detection of complications after surgery. Advances in CT and MR imaging have greatly improved the ability to detect or confirming non-idiopathic causes of scoliosis, including abnormalities within the spinal canal. Three-dimensional thinking has become more important in evaluating and understanding scoliosis.

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A case is presented of a young boy in whom features of Trevor's dysplasia epiphysealis hemimelica and Ollier's enchondromatosis coexisted in a single extremity, the right upper. As Trevor disease consists of osteochondromas of epiphyses and their equivalents, such as carpal and tarsal bones, it is of interest that exostosis-like centers of the neck of radius and perhaps the proximal third metacarpal are present as well. Advanced maturation of selected centers was most marked at the right scaphoid. The child shows alignment abnormalities as a consequence of the varied lesions, including a varus of the right wrist. The coexistence of these varied osteochondromatous abnormalities in one extremity suggests a relationship in their etiologies.

Because infants from 1 to 6 months of age often normally show symmetric diaphyseal periosteal reaction, careful analysis of the reaction at a midshaft fracture site is needed to date the fracture, especially in a child-abuse evaluation. We present a case of an acute fracture through such physiologic reaction.

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