Türker Acar, Duran Efe, Ahmet Okuş, İrfan Öcal, Mustafa Harman. A rare solid tumor of the retroperitoneum with venous extension and lung metastasis: Extra-gastrointestinal stromal tumor. Turkish Journal of Gastroenterology [Internet]. 2019 Jul. 25 [cited 2025 Jul. 10];26(4):358-9. Available from: https://turkjgastroenterol.avesjournals.com/index.php/tjg/article/view/3168