Intramural hematoma with dissection is located within the layers of the tunica media but may be eccentric toward the intima (subintimal dissection) or adventitia (subadventitial dissection). Subintimal dissections are more likely to cause luminal stenosis, whereas subadventitial dissection may cause arterial dilation (aneurysm or fusiform dilation).1
Kato Y, Dembo T, Takeda H, et al. Dissection or Hemorrhage Into Arteriosclerotic Plaque—Reply. Arch Neurol. 2011;68(6):830. doi:10.1001/archneurol.2011.116
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