Gastrointestinal stromal tumors:CT diagnosis / 中华放射学杂志

ABSTRACT

Objective To investigate the specific CT findings of gastrointestinal stromal tumors (GIST).Methods The CT imaging of 12 cases of GISTs confirmed operatively and pathologically were reviewed and analyzed.The gross pathologic findings of the tumors were compared with the manifestations of CT study.Results Two of the GIST were from the stomach,2 from the duodenum,4 from jejunum,and 1 from the junction of jejunum and ileum,ileum,rectum and mesenterium respectively.5 of 8 cases with GIST from intestine had history of hemafecia or positive of fecal occult blood test.9 of the 12 GISTs were malignant,1 of them was potentially malignant,1 was not sure to be malignant or benign.CT studies of 11 of the 12 tumors showed as exogenous mass of 3-20 cm,only 1 with less than 5 cm and 8 of them with over 5 cm.in the max diameter the tumors were cystic-solid with inhomogenous attenuation.The solid potion of tumors enhanced moderately to markedly after the contrast media administered.Ulcer was seen in the tumors of 2 cases,and the diameter of both of them were over 12 cm.Punctate calcification was seen in 1 GIST.Conclusion CT findings of GIST were specific to a certainty.CT study is helpful for locating the tumor and observation of the relationship of the tumor and surrounding structures.