Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration.
Y, O., M, I., K, M., I, F., A, T., N, K., R, Y., M, K., T, N., & M, N. (2026). Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration.. Surgical and radiologic anatomy : SRA. https://doi.org/10.1007/s00276-026-03911-0
Y O, M I, K M, I F, A T, N K, et al. Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration.. Surgical and radiologic anatomy : SRA. 2026; doi: 10.1007/s00276-026-03911-0
Y O, M I, K M, et al. Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration.[J]. Surgical and radiologic anatomy : SRA. 2026. DOI: 10.1007/s00276-026-03911-0.
@article{y2026,
author = {Oyamada Y and Isoda M and Mori K and Fukui I and Tamase A and Kodama N and Yamada R and Kojima M and Nakano T and Nomura M},
title = {Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration.},
journal = {Surgical and radiologic anatomy : SRA},
year = {2026},
doi = {10.1007/s00276-026-03911-0},
note = {PMID: 42223500},
}
TY - JOUR AU - Oyamada Y AU - Isoda M AU - Mori K AU - Fukui I AU - Tamase A AU - Kodama N AU - Yamada R AU - Kojima M AU - Nakano T AU - Nomura M TI - Anatomic variations uncommon variant of the callosomarginal artery originating from A1 segment of the anterior cerebral artery with an unruptured aneurysm and distal A1 fenestration. T2 - Surgical and radiologic anatomy : SRA PY - 2026 DO - 10.1007/s00276-026-03911-0 AN - PMID:42223500 ER -
Some anatomical variations in the A1 segment of the anterior cerebral artery have been reported, but large cortical branches arising from this A1 segment are rare. Herein, we report an unusual case of a callosomarginal artery originating from the A1 segment associated with an unruptured aneurysm and distal A1 fenestration in an 85-year-old woman. These variants and aneurysm were incidentally identified on magnetic resonance angiography performed for the evaluation of cerebral infarction. Magnetic resonance imaging is useful in identifying anomalies in cerebrovascular structures. Conservative management was selected because of the small size of the aneurysm and the patient's advanced age.