The specimen consists of the base of the heart with attached aortic arch and pulmonary vessels. A
portion of lung is also attached. Situated in the aortic arch, immediately distal to the origin of the
left subclavian artery, there is a saccular aneurysm abutting on adjacent lung tissue. The aneurysm
has a large linear tear over the antero-superior surface and contains a large organized thrombus.
The portion of lung shows widespread parenchymal and subpleural anthracosis. The hilar lymph
nodes are also anthracotic.