Endo Hideki, Ono Hidetoshi, Nakamura Hirohiko
Department of Neurosurgery, Nakamura Memorial Hospital, South 1, West 14, Chuo-Ku, Sapporo, Hokkaido, 060-8570, Japan.
Department of Radiology, Nakamura Memorial Hospital, Sapporo, Hokkaido, Japan.
Surg Radiol Anat. 2024 Dec 22;47(1):39. doi: 10.1007/s00276-024-03542-3.
Although both accessory middle cerebral artery (MCA) of distal origin and anterior communicating artery (ACoA) duplication are not rare anatomical variations, their combination is extremely rare and there are only a few reports of such combinations.
We report a case of distal origin accessory MCA associated with ACoA duplication diagnosed by magnetic resonance angiography (MRA).
A 63-year-old man visited another hospital for screening examinations for cerebrovascular disease. He was noted to have a possible intracranial aneurysm at the A1-A2 junction of the right anterior cerebral artery on MRA. He was referred to our hospital for its management. More detailed 3-Tesla MRA volume rendering images revealed ACoA duplication, not an aneurysm. MRA also showed the right distal origin accessory MCA arising from the A2 segment distal to the ACoA duplication.
This rare combination of anatomical variations requires careful imaging assessment. MRA volume rendering images were useful in our case.
虽然大脑中动脉（MCA）远端起源的副动脉和前交通动脉（ACoA）重复均为并不罕见的解剖变异，但它们同时出现极为罕见，仅有少数关于此类组合的报道。
我们报告1例通过磁共振血管造影（MRA）诊断出的远端起源副大脑中动脉合并前交通动脉重复的病例。
一名63岁男性因脑血管疾病筛查前往另一家医院就诊。MRA检查发现其右侧大脑前动脉A1 - A2交界处可能存在颅内动脉瘤。他被转诊至我院进行治疗。更详细的3特斯拉MRA容积再现图像显示为前交通动脉重复，而非动脉瘤。MRA还显示右侧远端起源的副大脑中动脉起自前交通动脉重复远端的A2段。
这种罕见的解剖变异组合需要仔细的影像学评估。在我们的病例中，MRA容积再现图像很有用。
