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In this study, we propose an easy method to immediately recognize \u201clow-lying\u201d PCoA aneurysms in neurosurgical practice. A total of 89 cases with \u201clow-lying\u201d PCoA aneurysms were retrospectively analyzed. All patients underwent preoperative digital subtraction angiography (DSA) examinations and microsurgical clipping. Cases were classified into the \u201clow-lying\u201d and regular groups based on intraoperative findings. The distance- and angle-relevant parameters that reflected the relative location of the aneurysms and tortuosity of the internal carotid artery were measured using 3D-DSA images. The data were sequentially integrated into a mathematical analysis to obtain the prediction model. Finally, we proposed a novel mathematical formula to preoperatively predict the existence of \u201clow-lying\u201d PCoA aneurysms with great accuracy. Neurosurgeons might benefit from this model, which enables them to directly identify \u201clow-lying\u201d PCoA aneurysms and make appropriate surgical decisions accordingly.<\/jats:p>","DOI":"10.1007\/s10143-024-02638-z","type":"journal-article","created":{"date-parts":[[2024,8,1]],"date-time":"2024-08-01T04:08:36Z","timestamp":1722485316000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A mathematical model to predict \u201clow-lying\u201d posterior communicating artery aneurysms in neurosurgical practice"],"prefix":"10.1007","volume":"47","author":[{"given":"Qianquan","family":"Ma","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lei","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhihao","family":"Song","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hongbo","family":"Wen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaihuan","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jingqi","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weixin","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tao","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yufeng","family":"Xu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Haoyu","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ting","family":"Lei","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuezhi","family":"Sun","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2024,8,1]]},"reference":[{"key":"2638_CR1","doi-asserted-by":"publisher","first-page":"1142","DOI":"10.1136\/neurintsurg-2020-015883","volume":"12","author":"R Rosato","year":"2020","unstructured":"Rosato R, Comptdaer G, Mulligan R et al (2020) Increased focal internal carotid artery angulation in patients with posterior communicating artery aneurysms. 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