title: Internal haemorrhagic pachymeningiosis: specific disease or complication of chronic subdural hematoma? Report of five cases surgically treated and literature review.
abstract: BACKGROUND
  Internal haemorrhagic pachymeningiosis (IHP) is a rare disease characterized by a fibrous thickening and inflammatory infiltration in dural space mimicking chronic subdural hematoma. The pathogenesis of IHP is not entirely clear yet and treatment is still controversial.
  
  
  OBJECTIVE
  We want to emphasize the importance of differentiating pachymeningiosis from chronic subdural hematoma as distinct pathological entities.
  
  
  METHODS
  The records of five selected cases of IHP histologically confirmed were reviewed, focusing onset, neuroimaging, surgery and outcomes.
  
  
  CONCLUSIONS
  IHP is most likely underestimated. Only through multidisciplinary approach it is possible to plane the proper therapeutic strategy. The diagnosis of IHP is confirmed by definitive histology but in some cases is possible with intraoperative frozen section.
authors.forename: B
authors.initials: B
authors.lastname: Carangelo
authors.forename: L
authors.initials: L
authors.lastname: Lavalle
authors.forename: G
authors.initials: G
authors.lastname: Muscas
authors.forename: G
authors.initials: G
authors.lastname: Peri
authors.forename: G
authors.initials: G
authors.lastname: Tiezzi
authors.forename: D
authors.initials: D
authors.lastname: Branco
authors.forename: D
authors.initials: D
authors.lastname: Tacchini
authors.forename: G
authors.initials: G
authors.lastname: Costantino
authors.forename: A
authors.initials: A
authors.lastname: Mariottini
authors.forename: A
authors.initials: A
authors.lastname: Maturo
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003937:Diagnosis, Differential; D004388:Dura Mater; D005260:Female; D020200:Hematoma, Subdural, Chronic / Q000150:complications / Q000601:surgery*; D006801:Humans; D020300:Intracranial Hemorrhages / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery*; D008297:Male