title: Wall lesions of abdominal aortic aneurysms threatening an impending rupture: prognostic evaluations.
abstract: BACKGROUND
  Final events preceding aneurysm rupture are not completely known. The current study relates to incomplete aortic aneurysm wall lesions (i.e. malacia, dark staining and blebs or blisters) as possible sites of aneurysm rupture.
  
  
  METHODS
  162 abdominal aortic aneurysms, resected between 1988 and 1996, have been reviewed and 27 cases of aneurysms presenting wall thickness lesions are reported. The lesions were scheduled by operative reports and compared to ultrasound and CT scans.
  
  
  RESULTS
  The authors classify aortic aneurysms into three phases, depending on the degree of wall degeneration viz 1. Flawless wall aneurysms. 2. (a-b-c) Aneurysms with intraparietal lesions. 3. Ruptured aneurysms.
  
  
  CONCLUSIONS
  It is concluded that stage 2 aortic aneurysms must be urgently operated on. They carry a high surgical risk and, consequently, higher morbidity and mortality compared with stage 1 aneurysms.
authors.affiliation: Chair of General Surgery, Institute of General and Cardiovascular Surgery, University of Milan, Italy.
authors.forename: R
authors.initials: R
authors.lastname: Scorza
authors.forename: M
authors.initials: M
authors.lastname: De Monti
authors.forename: J
authors.initials: J
authors.lastname: Lazaridis
authors.forename: G
authors.initials: G
authors.lastname: Sgroi
authors.forename: G
authors.initials: G
authors.lastname: Ghilardi
mesh_terms: D000009:Abdominal Muscles / Q000000981:diagnostic imaging / Q000601:surgery; D000368:Aged; D017542:Aneurysm, Ruptured / Q000000981:diagnostic imaging* / Q000401:mortality / Q000601:surgery; D017544:Aortic Aneurysm, Abdominal / Q000000981:diagnostic imaging* / Q000401:mortality / Q000601:surgery; D019917:Blood Vessel Prosthesis Implantation; D006801:Humans; D011379:Prognosis; D012189:Retrospective Studies; D012307:Risk Factors; D012422:Rupture, Spontaneous; D015996:Survival Rate; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography