Farias JP, Trindade AM
Department of Neurosurgery, Hospital de Santa Maria, Lisbon, Portugal
Title
Giant distal anterior cerebral artery aneurysm not
visualized on angiography: case report.
Source
Surg Neurol 1997 Oct;48(4):348-351
Abstract
BACKGROUND: Giant distal anterior cerebral artery (ACA) aneurysms are rare
lesions, with only 10 cases having been reported in the literature. Their diagnosis
may be difficult on computed tomography (CT) scan, often simulating a callosal
tumor or hematoma, with only magnetic resonance imaging (MRI) scan or
angiography allowing a correct diagnosis. CASE REPORT: The authors present one
case of a giant distal ACA aneurysm not visualized on angiography, and whose
MRI scan was interpreted as a hemorrhage from a cavernoma or a glioma. The
correct diagnosis was only made during surgery, and was confirmed by
histopathologic examination. CONCLUSIONS: The authors conclude that distal ACA
aneurysms must be considered in the presence of a callosal mass, even with
negative angiography, especially if there has been evidence of bleeding from the
lesion.