**4. Pathology**

The pathological features have been described based on autopsy findings of cases of MMD. The most common lesion is intracranial hemorrhage, which occurs in basal ganglia, thalamus, hypothalamus and brain stem. The intracranial hemorrhage may show intraventricular extension. Other findings are subarachnoid hemorrhage and small infarcts in the capsule- ganglionic area [14]. The main pathological findings according to the vessels involved are mentioned below.


Thus, the pathology of the disease can be viewed as ICA [Internal carotid artery] to ECA [External carotid artery] prism, where the contribution of ICA to cerebral blood supply gradually decreases, and the compensatory vascular network is formed which is predominantly fed by ECA.
