title: Avascular necrosis of spine: a rare appearance.
abstract: METHODS
  Avascular necrosis (AVN) of two contiguous vertebrae along with the intervening disc is presented.
  
  
  OBJECTIVE
  AVN of two contiguous vertebrae and the intervening disc is a rare entity and can be confused with infective and neoplastic processes. We present the role of magnetic resonance imaging (MRI) in the diagnosis of AVN.
  
  
  BACKGROUND
  AVN of vertebral bodies is a known entity; however, involvement of two contiguous vertebrae along with the intervening disc is atypical. The imaging features can be confused with an infective etiology, which involves the disc more commonly as compared to AVN. Neoplastic destruction of vertebrae also needs to be ruled out in appropriate clinical situations.
  
  
  METHODS
  Frontal and lateral radiographs of the lumbar spine were performed followed by an MRI. Subsequently CT-guided fine needle aspiration cytology was performed.
  
  
  RESULTS
  These radiographic features were correlated with the clinical and pathologic findings. The MRI findings of a wedge-shaped lesion with classic fluid intensity (hyperintense signal, like that of cerebrospinal fluid on T2-weighted images) are characteristic of AVN. Fine needle aspiration cytology confirmed the diagnosis and excluded an infective or a neoplastic process.
  
  
  CONCLUSIONS
  The MRI findings described in this report are very characteristic of AVN of spine. Clinical and radiologic correlation could help in making the diagnosis and avoid unnecessary investigations.
authors.affiliation: Department of Radiology, K.E.M. Hospital, Mumbai-400025, India. praveenparikshitdas@rediffmail.com
authors.forename: Praveen R
authors.initials: PR
authors.lastname: Maheshwari
authors.forename: Arpit M
authors.initials: AM
authors.lastname: Nagar
authors.forename: Shashank S
authors.initials: SS
authors.lastname: Prasad
authors.forename: Jeshil R
authors.initials: JR
authors.lastname: Shah
authors.forename: Deepak P
authors.initials: DP
authors.lastname: Patkar
mesh_terms: D000058:Accidental Falls; D044963:Biopsy, Fine-Needle; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D017116:Low Back Pain / Q000209:etiology; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging* / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D010020:Osteonecrosis / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D015663:Osteoporosis, Postmenopausal / Q000150:complications; D013122:Spinal Diseases / Q000000981:diagnostic imaging* / Q000209:etiology / Q000473:pathology; D013125:Spinal Neoplasms / Q000175:diagnosis; D014057:Tomography, X-Ray Computed