<prompt> Common causes of vertebra planaTBEosinophilic granulomaMetastasisAll of the above  <response>: Ans. is d i.e., All of the above Vertebra planao This term is used to describe uniform collapse of a vertebral body into a thin, flat disc. The most common cause is eosinophilic granuloma, with the thoracic vertebrae most frequently affected. Causes areHistocytosis - X Eosinophilic granulomaLeukemiaTBMetastasis, Multiple myeloma, Ewing ys sarcoma, lymphomaOsteochondritis of vertebral body Calves diseaseHemangiomaTraumaSteroids 