<prompt> Vertebra plana occurs inEosinophilic granulomaChondrosarcomaOsteosarcomaFibrosarcoma  <response>: Eosinophilic granuloma 182-83-A 226-CDT-orthopedics 4thEosinophilic-granuloma and Histiocytosis - X ray shows a well demarcated oval area of radiolucency within the bone, sometimes this is associated with marked reactive sclerosis. There may be multiple lesions and in the skull they have characteristic punched out - appearance. Vertebral collapse may result in a flat wedge vertebra plana which is pathognomonic and coin-on-end appearance Eosinophilic granuloma usually resolves spontaneously The use of anterior decompression and anterior fusion is the treatment of choice in patients with neurologic symptoms 