The diagnostic value of multi-slice CT (MSCT) and its multiplanar reconstruction techniques in the diagnosis of gastrointestinal stromal tumors

Objective To evaluate the diagnostic value of MSCT and its multiplanar reconstruction techniques(MPR) in the diagnosis of gastrointestinal stromal tumors(GISTs) through discussing the MSCT features. Methods Thirty-one cases with gastrointestinal stromal tumors were analyzed retrospectively, which were confirmed by pathology and immuno-histochemistry follow-up.Plain and enhanced MSCT scanning were performed in all cases. CT manifestation in MPR were observed comprehensively and compared with pathological results. Results Tumor located in stomach (n=20), small intestine (n=8), esophagus (n=1), extra-gastrointestine (n=2); 11 were benign, 20 were malignant, there are 19 of extercavitary, 6 of intracavitary, 6 of intra-extercavitary; the diameter of tumor 12 cases were 5 cm in 19 cases; 15 cases were solid mass, 16 cases were seen necrosis and cystic changes, most of mass had heterogeneous density, on contrast enhanced scans, inhomogeneous moderate or marked tumor enhancement were seen. Conclusions MSCT and MPR can show the characteristics of GISTs clearly and localize GISTs precisely, but it has a certain limit in differentiating benign from malignant GISTs. Key words: Gastrointestinal stromal tumors ;  Tomography ;  X-ray computer ;