title: Angiographic findings of gastrointestinal stromal tumor.
abstract: OBJECTIVE
  To discuss the angiographic features of gastrointestinal stromal tumor (GIST) and to evaluate their diagnostic role.
  
  
  METHODS
  Twelve patients with pathologically proved GIST underwent angiography (DSA)1 wk before operation, using Puck and digital subtraction DSA. The origin, size, morphology and angiographic appearance of the lesions were reviewed.
  
  
  RESULTS
  Two tumors arose from stomach, 8 from jejunum, and 2 from ileum. Seven cases were benign and 5 were malignant. Obviously thickened supplying arteries were detected in 8 tumors, and early-developed veins were found in 3. Two types of angiographic changes of GIST were observed. Four cases had twisted irregular neoplastic vessels with partially coarse and indistinct margins, which were all malignant. Eight cases had ball-like neoplastic vessels with uniform tumor staining, of which 7 were benign and 1 was malignant.
  
  
  CONCLUSIONS
  Angiography facilitates localization and diagnosis of GIST, helps define their size, range and location, and is especially valuable to patients suffering from melena with unknown reasons.
authors.affiliation: Department of Radiology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310016, Zhejiang Province, China. fangsonghua@163.com
authors.forename: Song-Hua
authors.initials: SH
authors.lastname: Fang
authors.forename: Dan-Jun
authors.initials: DJ
authors.lastname: Dong
authors.forename: Shi-Zheng
authors.initials: SZ
authors.lastname: Zhang
authors.forename: Mei
authors.initials: M
authors.lastname: Jin
mesh_terms: D000328:Adult; D000792:Angiography / Q000379:methods; D005260:Female; D005767:Gastrointestinal Diseases / Q000000981:diagnostic imaging / Q000473:pathology; D005770:Gastrointestinal Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007078:Ileal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D007580:Jejunal Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D008297:Male; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology; D017154:Stromal Cells / Q000000981:diagnostic imaging / Q000473:pathology*