BACKGROUND AND PURPOSE: Microvascular changes such as microaneurysms and fibrinoid necrosis have been found in the presence of cerebral amyloid angiopathy (CAA). These CAA-associated microvasculopathies (CAA-AM) may contribute to the development of CAA-associated hemorrhages and/or infarcts, hereafter referred to as "cerebrovascular lesions." Hereditary cerebral hemorrhage with amyloidosis, Dutch type (HCHWA-D) is an autosomal dominant form of CAA, in which the amyloid angiopathy is pathologically and biochemically similar to sporadic CAA associated with aging and Alzheimer disease. To determine the significance of CAA-AM for CAA-associated cerebrovascular complications, we investigated the association between CAA-AM and cerebrovascular lesions in HCHWA-D patients. METHODS: In a previous autopsy study we semiquantitatively scored CAA-AM in 29 HCHWA-D patients. In the present study we reviewed clinical charts and autopsy protocols of these same patients. We investigated whether CAA-AM was associated with age at death, number of cerebrovascular lesions, duration of clinical illness, hypertension, and atherosclerosis. RESULTS: An association was found between CAA-AM and the number of cerebrovascular lesions (P = 0.009). The presence of microaneurysmal degeneration was most strongly associated with the number of cerebrovascular lesions (P < 0.001). In addition, we found an association between atherosclerosis and the CAA-AM score (P = 0.047). Hypertension was not associated with CAA-AM. CONCLUSIONS: Our findings support previous reports suggesting an important role of secondary microvascular degenerative changes in CAA-associated cerebrovascular lesions and suggest an aggravating effect of systemic atherosclerosis, but not hypertension, on the evolution of CAA-AM. These findings may be of relevance to understanding cerebrovascular complications of sporadic or Alzheimer disease-associated CAA.
BACKGROUND AND PURPOSE: Microvascular changes such as microaneurysms and fibrinoid necrosis have been found in the presence of cerebral amyloid angiopathy (CAA). These CAA-associated microvasculopathies (CAA-AM) may contribute to the development of CAA-associated hemorrhages and/or infarcts, hereafter referred to as "cerebrovascular lesions." Hereditary cerebral hemorrhage with amyloidosis, Dutch type (HCHWA-D) is an autosomal dominant form of CAA, in which the amyloid angiopathy is pathologically and biochemically similar to sporadic CAA associated with aging and Alzheimer disease. To determine the significance of CAA-AM for CAA-associated cerebrovascular complications, we investigated the association between CAA-AM and cerebrovascular lesions in HCHWA-D patients. METHODS: In a previous autopsy study we semiquantitatively scored CAA-AM in 29 HCHWA-D patients. In the present study we reviewed clinical charts and autopsy protocols of these same patients. We investigated whether CAA-AM was associated with age at death, number of cerebrovascular lesions, duration of clinical illness, hypertension, and atherosclerosis. RESULTS: An association was found between CAA-AM and the number of cerebrovascular lesions (P = 0.009). The presence of microaneurysmal degeneration was most strongly associated with the number of cerebrovascular lesions (P < 0.001). In addition, we found an association between atherosclerosis and the CAA-AM score (P = 0.047). Hypertension was not associated with CAA-AM. CONCLUSIONS: Our findings support previous reports suggesting an important role of secondary microvascular degenerative changes in CAA-associated cerebrovascular lesions and suggest an aggravating effect of systemic atherosclerosis, but not hypertension, on the evolution of CAA-AM. These findings may be of relevance to understanding cerebrovascular complications of sporadic or Alzheimer disease-associated CAA.
Authors: Philip B Gorelick; Angelo Scuteri; Sandra E Black; Charles Decarli; Steven M Greenberg; Costantino Iadecola; Lenore J Launer; Stephane Laurent; Oscar L Lopez; David Nyenhuis; Ronald C Petersen; Julie A Schneider; Christophe Tzourio; Donna K Arnett; David A Bennett; Helena C Chui; Randall T Higashida; Ruth Lindquist; Peter M Nilsson; Gustavo C Roman; Frank W Sellke; Sudha Seshadri Journal: Stroke Date: 2011-07-21 Impact factor: 7.914
Authors: Virawudh Soontornniyomkij; Matthew D Lynch; Sherin Mermash; Justine Pomakian; Haleh Badkoobehi; Ryan Clare; Harry V Vinters Journal: Brain Pathol Date: 2009-07-16 Impact factor: 6.508