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AIM:Gastrointestinal stromal tumor (GIST) is a rare typeof cancer.Computed tomography (CT) is an imagingmodality of choice for diagnosing GIST.The aim of thisretrospective study was to review the CT imaging featuresof 17 GIST patients.METHODS:From 1995 to 2003,there were 47 patientswith pathologically proven GISTs at our hospital.Of these,17 patients underwent preoperative CT.We collected andanalyzed these CT images.The CT imaging features includedtumor diameter,number and location,tumor margin,location of metastasis,hounsfield units of tumor and effectof contrasts.In addition,we also recorded the surgicalfindings,including complications,tumor size and locationfor comparative analysis.RESULTS:The results showed that 12 (70%) tumors werelocated in the stomach and five (30%) were located in thejejunum mesentery.GISTs were extraluminal in 12 (70%)patients.The tumor margins of 13 (76%) tumors werewell defined and irregular in four (24%).The effect ofcontrast enhancement on GIST CT imaging was homogenousenhancement in 13 (76%) and heterogeneous enhancementin four (24%).The hounsfield units (HU) were 30.41±5.01for precontrast images and postcontrast hounsfield unitswere 51.80±9.24.CONCLUSION:The stomach was the commonest site ofGIST occurrence among our patients.The CT features ofGIST were well-defined tumor margins,homogenousenhancement on postcontrast CT images.
AIM: Gastrointestinal stromal tumor (GIST) is a rare type of cancer. Computed tomography (CT) is an imaging modality of choice for diagnosing GIST. The AIM of this retrospective study was to review the CT imaging features of 17 GIST patients. METHODS: From 1995 to 2003 , there were 47 patients with pathologically proven GISTs at our hospital. Of these, 17 patients underwent preoperative CT. We collected and analyzed these CT images. CT imaging features include tumor diameter, number and location, tumor margin, location of metastasis, hounsfield units of tumor Results: 12 of 70 (70%) tumors werelocated in the stomach and five (30%) were located in the jejunum mesentery . GISTs were extraluminal in 12 (70%) patients. The tumor margins of 13 (76%) tumors were well defined and irregular in four (24%). The effect of enhancement on GIST CT imaging The hounsfield units (HU) were 30.41 ± 5.01 for precontrast images and postcontrast hounsfield unitswere 51.80 ± 9.24. CONCLUSION: The stomach was the commonest site of Genomics from among our (24%). patients. CT features of GIST were well-defined tumor margins, homogenousenhancement on postcontrast CT images.