Chronic Encapsulated Expanding Thalamic Hematoma Associated with Obstructive Hydrocephalus following Radiosurgery for a Cerebral Arteriovenous Malformation: A Case Report and Literature Review

Figure 2

(a) Histological findings reveal hematoma capsule consisting of a dense collagenous layer with extensive invasion of macrophages, hematoxylin and eosin, ×40. (b) Immunohistochemical findings showing numerous CD68-positive cells in the cyst wall, original magnification ×40. (c) Vessel wall is thickened and internal elastica lamina is intact, revealing no residual nidus in the incised cyst wall, Masson, ×100.

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