title: Study on the pathomorphology of myelodysplasia.
abstract: OBJECTIVE
  To study the clinical pathomorphology of myelodysplasia and research its relationship with the neurological defect of myelodysplasia.
  
  
  METHODS
  184 patients with myelodysplasia were diagnosed and evaluated depending on patient history, physical examination, imaging, voiding cystourethrogram and urodynamic tests. 182 patients underwent surgical management. The intraspinal anomalies and their relationships with the spinal cords were observed and recorded during operations. The pathological tissues which were resected during the operations were examined postoperatively.
  
  
  RESULTS
  Myelodysplasia was divided into 6 types depending on the intraspinal pathomorphology: type I (tethered spinal cord with morbid terminal filum), type II (tethered spinal cord with fibrous adhesion), type III (lipoma on the spinal cord), type IV (intraspinal cyst), type V (split cord malformations), and type VI (defect of spinal cords and/or nerve roots).
  
  
  CONCLUSIONS
  Theneurological defect of myelodysplasia results from its intraspinal anomaly and the morphological change of the spinal cord. It should be actively diagnosed and surgically treated to improve the prognosis.
authors.affiliation: Shandong Provincial Hospital, Shandong Uniersity, Jinan, PR China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Wang
authors.forename: Xiaohui
authors.initials: X
authors.lastname: Bai
authors.forename: Daqing
authors.initials: D
authors.lastname: Sun
authors.forename: Ke
authors.initials: K
authors.lastname: Han
authors.forename: Jinliang
authors.initials: J
authors.lastname: Li
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D009436:Neural Tube Defects / Q000473:pathology* / Q000601:surgery*; D013116:Spinal Cord / Q000033:anatomy & histology / Q000473:pathology / Q000601:surgery; D055815:Young Adult