title: [Value of computed tomography features for prognosis evaluation of gastrointestinal stromal tumor].
abstract: OBJECTIVE
  To analyze the association between CT features and survival rate of GIST, and to elucidate the significance of CT features for prognosis.
  
  
  METHODS
  Clinical data of 38 patients with pathologically and immunohistochemically proven GISTs, including 11 patients at high biological risk, 13 at moderate risk, 10 at low risk and 4 at very low risk. Patients who underwent CT examination for primary tumors were included. Association between CT features and survival rate was examined.
  
  
  RESULTS
  The mean follow-up period of 38 cases was 42.6 months and the 3-year survival rate was 86.8%. Univariate analysis revealed that tumor growth pattern, diameter, lobulated shape, irregular margin, necrosis, ulceration, adjacent invasion, and liver metastasis were associated factors of 3-year survival rate. Circumference invasion and hepatic metastases predicted poor 3-year survival rate (P<0.05). Calcification and intensity were not associated with prognosis (P>0.05).
  
  
  CONCLUSIONS
  CT can demonstrate the tumor growth pattern, size, shape, boundary, density, necrosis, hemorrhage, calcification, ulcer, enhance features and metastasis. CT can play an important role in estimating the survival rate of GIST.
authors.affiliation: Radiology Department, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
authors.forename: Zhen-peng
authors.initials: ZP
authors.lastname: Peng
authors.forename: Can-hui
authors.initials: CH
authors.lastname: Sun
authors.forename: Yan-ji
authors.initials: YJ
authors.lastname: Luo
authors.forename: Zhi
authors.initials: Z
authors.lastname: Dong
authors.forename: Xue-hua
authors.initials: XH
authors.lastname: Li
authors.forename: Zi-ping
authors.initials: ZP
authors.lastname: Li
authors.forename: Shi-ting
authors.initials: ST
authors.lastname: Feng
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D005500:Follow-Up Studies; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging*; D046152:Gastrointestinal Stromal Tumors / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D015996:Survival Rate; D014057:Tomography, X-Ray Computed / Q000379:methods*