title: [Diagnosis of spontaneous isolated superior mesenteric artery dissection using computed tomography angiography].
abstract: OBJECTIVE
  To investigate the characteristics of the spontaneous isolated superior mesenteric artery dissection (SISMAD) on computed tomography angiography (CTA).
  
  
  METHODS
  Twenty-five patients with unexplained acute abdominal pain received CTA.
  
  
  RESULTS
  Four cases with the SISMAD were found and all were male with a mean age of (45.3±6.7) years. Two patients had hypertension history. CT showed enlarged diameter of the superior mesenteric artery with dissection in 4 cases, intimal flap and visible false lumen in 2 cases, ulcer-like laceration in 1 case, and intramural hematoma in 1 case. The proximal lacerations or entries were all at the proximal segment of the superior mesenteric artery. CTA classifications were type Ia (n=2), IIb (n=1), and III (n=1). Two patients underwent repeated CTA when discharged, and progressive changes were discovered.
  
  
  CONCLUSIONS
  CTA can clearly show the characteristics of the superior mesenteric artery dissection, confirm the diagnosis, and provide an important basis for the classification and follow-up observation.
authors.affiliation: Department of Radiology, Shenzhen Nanshan People's Hospital, Guangdong Medical College, Shenzhen 518052, China.
authors.forename: Ke-wen
authors.initials: KW
authors.lastname: Peng
authors.forename: Bi-xian
authors.initials: BX
authors.lastname: Shen
authors.forename: Yan
authors.initials: Y
authors.lastname: Gao
authors.forename: Zhi-bin
authors.initials: ZB
authors.lastname: Zeng
authors.forename: Chun-rong
authors.initials: CR
authors.lastname: Wang
authors.forename: Peng
authors.initials: P
authors.lastname: Xiao
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000784:Aortic Dissection / Q000000981:diagnostic imaging*; D000792:Angiography / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D017538:Mesenteric Artery, Superior / Q000000981:diagnostic imaging; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D055815:Young Adult