title: [Vertebral interposed bone tissue. Case report].
abstract: We present a male subject with interposed bone tissue between L5-S1 levels. We performed a bibliographic search and we did not find a case like this one. The objective of this work is to report this finding, so it could be considered as a cause of low back pain and hypogastrium pain.
  
  
  METHODS
  Male, irrelevant clinical history presenting with pain in hypogastrium during physical exertion. We found a bone between L5-S1 on simple X-rays. He was treated with NSAID's and improved on symptoms.
  
  
  CONCLUSIONS
  We performed a search of similar cases, and did not find data as in our case. This case report will permit to associate to similar problems, and to define if it is a clinical entity with its own characteristics.
authors.affiliation: Colegio Mexicano de Ortopedia y Traumatología, AC, México.
authors.forename: Leonardo Zamudio
authors.initials: LZ
authors.lastname: Villanueva
mesh_terms: D000013:Congenital Abnormalities / Q000175:diagnosis / Q000628:therapy; D006801:Humans; D008159:Lumbar Vertebrae / Q000002:abnormalities*; D008297:Male; D008875:Middle Aged; D012447:Sacrum / Q000002:abnormalities*