**Internal mammary artery aneurysm** (IMA) is a vascular disease that is a disorder of the structure of the arterial vessel wall, which is accompanied by its dilation and thinning. The pathology is characterized by a violation of the integrity of the vascular wall along the line of maximum thinning, which covers a third of its thickness in about
Aneurysm within an aneurysm
An aneurysm is a protrusion (sac-like or tubular), a bulging of the vessel wall. Most often, aneurysmal protrusions form in places of anatomical narrowing of blood vessels, which contributes to the increase in excess wall stress. It is observed more often in older people. Quite often, aneurystes are observed on the vessels of the brain.