DOI: https://doi.org/10.36347/sasjs.2025.v11i07.003

Pages: 776-780

Gastrointestinal stromal tumors (GISTs) are the most common mesenchymal tumors of the gastrointestinal tract, with the small intestine being the second most common site. Our case involves a 37-year-old male with a chronic smoking history weaned 13 years ago, reported to our department with vomiting and right iliac fossa pain without gastrointestinal bleeding. The physical examination revealed a bulky mass on the right flank. CT scans revealed a large process with increasing measurements, where the mass was in contact with the anterior abdominal wall invading the bladder. The MRI showed the process encompassing the bladder dome. Surgical removal of the 16cm mass and a portion of the detrusor muscle was performed, followed by histopathological exam confirming the GIST diagnosis without real bladder invasion.