Microaneurysms of Charcot-Bouchard
AKA miliary aneurysms 1). Occur primarily at the bifurcation of small (< 300 mcm) perforating branches of lateral lenticulostriate arteries in basal ganglia (found in 46% of hypertensive patients over age 66, but only in 7% of controls 2)). Possibly the origin of some “hypertensive” ganglionic (putaminal) hemorrhages, 3) but this is controversial.
1)
Wakai S, Nagai M. Histological Verification of Microaneurysms as a Cause of Cerebral Hemorrhage in Surgical Specimens. J Neurol Neurosurg Psychiatry. 1989; 52:595–599
2)
Newton TH, Potts DG. Radiology of the Skull and Brain. Saint Louis 1971
3)
Kaneko M, Tanaka K, Shimada T, et al. Long-Term Evaluation of Ultra-Early Operation for Hypertensive Intracerebral Hemorrhage in 100 Cases. J Neurosurg. 1983; 58:838–842