10. Vertebra plana represents marked flattening of a vertebral body with relatively preserved intervertebral disk space. Eosinophilic granuloma is the most common cause; other causes include: multiple myeloma, metastatic disease, Ewing sarcoma, lymphoma, leukemia, Gaucher disease, TB, aneurysmal bone cyst, infection etc.
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14. - Axial fat-suppressed proton-density MR image shows abnormal high signal intensity in the medullary canal of the fibula, as well as in the large soft tissue mass surrounding the fibula.
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17. Advanced LeggCalvePerthes' disease with flattening and fragmentation of the femoral epiphysis and focal lucencies within the metaphysis.