Correlation of Magnetic Resonance Imaging and Histological Findings in a Large Basilar Tip Aneurvsm After Coil Embolization

概要

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A 73-year-old female with a large basilar tip aneurysm underwent endovascular coil embolization with interlocking detachable coils(IDCs). The patient subsequently died of pneumonia 25 days after the embolization, and the aneurysm specimen was obtained at autopsy. Histological examination showed that the intraaneurysmal structure cnsisted of three layers. The outer layer was mildly organized thrombus surrounding the coils, the middle layer was disorganized clot, and the inner consisted of fresh blood clot. Gradient-echo magnetic resonance(MR)imaging taken before death had demonstrated a central region of high intensity and a peripheral low intensity region corresponding to the inner and middle-outer layers of the aneurysm, respectively. Intraaneurysmal placement of IDCs leads to the formation of a clot surrounding the coils. However, clot formation may be inadequate where the packing of the IDCs is incomplete. Comparison of the MR imaging and histological findings in this case show that gradient-echo MR imaging can assess thrombus and residual blood flow within the aneurysm.
日本脳神経外科学会の論文
2000-10-15