Male 65 yo, occult blood stool (+) in check-up, then underwent colonic endoscopy to confirm colon tumor, but only colonic polyp was detected.
Ultrasound pre endoscopy disclosed a hypoechoic mass in LLQ, semilunar shape, with size of 28x25mm which one part of contour was regularly round and another part close by lumen gas inside a loop of small bowel . There was vessels into this mass.
The LLQ mass was thought to be a GIST of small bowel.
CEA rising of 5.38ng/mL
MSCT confirmed the small bowel GIST later.
Surgery was done, macroscopic result was mural tumor of small bowel.
Microscopy and immunohistostaining were proved for GIST tumorof small bowel.