Blood Vessels

There is a large abnormal mass of vessels in the parietal lobe (arrow). Such abnormal vessels are prone to bleeding.
AVM (MRI of brain)


There is a mass of irregular, tortuous vessels over the left posterior parietal region. This is one cause for hemorrhage, particularly in persons aged 10 to 30 years.
AVM Brain


Serial sections reveal a large vascular malformation involving much of the brainstem. Such lesions, however, are most common in the cerebral hemispheres.
AVM Brainstem