We present a case with a left gastric artery pseudoaneurysm in a 51-year-old female confirmed on computed tomography and angiography. These aneurysms are rare but are prone to rupture leading to death. Although many are discovered incidentally, early definitive treatment is advocated to prevent subsequent rupture. Successful embolisation was achieved by transcatheter intra-arterial thrombin injection guided by fluoroscopic and Doppler ultrasound imaging. Our case demonstrates an alternative way of treating these entities by recourse to interventional radiology.