Results and follow up
We proceeded further with a chest CT angiogram, which revealed a well-defined anterior mediastinal soft tissue density mass lesion measuring about 84.9x67.2mm, seen at the aorto-pulmonary window. The mass exhibited a mass effect, compressing the main pulmonary artery and proximal ascending aorta. The mass showed a calcified wall with enhancement after IV contrast, with two different densities within. The mass showed close contact, almost inseparable from the ascending aorta. A definite relation with the aorta could not be established, whether it originated from or was invading it (Figure 5).