Percutaneous coronary intervention is a useful non-surgical technique widely used in the treatment of angina. One of the rare complications that can develop after a percutaneous coronary intervention is a coronary pseudoaneurysm. These aneurysms may cause stent thrombosis and coronary rupture leading to life-threatening cardiac tamponade. Therefore, it is important to detect and diagnose high-risk Coronary Pseudoaneurysms (CPSA) early so that prompt treatment can be initiated. Here, we present a case of an asymptomatic cardiac patient who previously underwent Percutaneous Coronary Intervention (PCI) and was being evaluated for an unrelated intraspinal tumor requiring neurosurgical excision and incidentally found to have a large pseudoaneurysm of the Left Circumflex (LCx) artery on CT coronary angiography.