{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T14:38:46Z","timestamp":1786113526426,"version":"build-2736575974"},"reference-count":33,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"7","license":[{"start":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T00:00:00Z","timestamp":1782864000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.ahajournals.org"],"crossmark-restriction":true},"short-container-title":["Stroke"],"published-print":{"date-parts":[[2026,7]]},"abstract":"<jats:sec>\n                    <jats:title>BACKGROUND:<\/jats:title>\n                    <jats:p>Focal cerebral arteriopathy-inflammatory type (FCA-i) is a leading cause of pediatric arterial ischemic stroke, but diagnostic challenges persist, particularly in East Asian populations where moyamoya disease (MMD) prevalence is high. The focal cerebral arteriopathy severity score quantifies arteriopathy severity but has not been validated in East Asian cohorts. We aimed to validate the focal cerebral arteriopathy severity score in Korean pediatric patients with FCA-i and compare temporal progression patterns with unilateral MMD.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>METHODS:<\/jats:title>\n                    <jats:p>We conducted a retrospective cohort study of children with arterial ischemic stroke presenting to Seoul National University Hospital between January 2002 and December 2024. Patients were classified according to the Childhood Arterial Ischemic Stroke Standardized Classification and Diagnostic Evaluation criteria. The focal cerebral arteriopathy severity score was applied to serial magnetic resonance angiograms at baseline, peak severity, and final follow-up.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>RESULTS:<\/jats:title>\n                    <jats:p>\n                      Among 216 children with arterial ischemic stroke, 132 patients (61.1%) demonstrated arteriopathy, including 49 with FCA-i (median age, 8.6 [interquartile range (IQR), 6.4\u201311.3] years; 55% male), 60 with MMD (median age, 5.7 [IQR, 3.1\u20139.2] years; 43% male), and 13 with arterial dissection (median age, 7.0 [IQR, 3.1\u201310.4] years; 62% male). In FCA-i patients, the severity score correlated significantly with baseline infarct burden (\u03c1=0.42;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      =0.0069) and exhibited characteristic monophasic evolution with early peak at 2 months followed by gradual recovery reaching lowest values at 11 months. Patients with unilateral MMD demonstrated consistently higher severity scores at all timepoints compared with FCA-i (baseline: 6.0 versus 2.0; final: 8.0 versus 3.0;\n                      <jats:italic toggle=\"yes\">P<\/jats:italic>\n                      &lt;0.001) without radiographic recovery. A baseline severity score \u22658.0 predicted contralateral progression in unilateral MMD with an area under the curve of 0.962 (sensitivity, 0.83; specificity, 0.91).\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>CONCLUSIONS:<\/jats:title>\n                    <jats:p>The focal cerebral arteriopathy severity score demonstrates validity as a dynamic biomarker for monitoring FCA-i in Korean pediatric patients, exhibiting characteristic monophasic recovery patterns that distinguish it from progressive unilateral MMD.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1161\/strokeaha.125.054748","type":"journal-article","created":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T09:00:22Z","timestamp":1777626022000},"page":"2031-2043","update-policy":"https:\/\/doi.org\/10.1161\/crossmarkpolicy","source":"Crossref","is-referenced-by-count":0,"title":["Focal Cerebral Arteriopathy Severity Score Validation and Temporal Dynamics in Korean Pediatric Stroke: Distinguishing Inflammatory Arteriopathy From Unilateral Moyamoya Disease"],"prefix":"10.1161","volume":"57","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-8762-4926","authenticated-orcid":true,"given":"Seungjae","family":"Lee","sequence":"first","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1842-9062","authenticated-orcid":true,"given":"Young Hun","family":"Choi","sequence":"additional","affiliation":[{"name":"Department of Radiology, Seoul National University Hospital (Y.H.C.), Seoul National University College of Medicine, Seoul, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0539-1448","authenticated-orcid":true,"given":"Woo Joong","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2240-3647","authenticated-orcid":true,"given":"Soo Yeon","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."},{"name":"Department of Genomic Medicine, Seoul National University Hospital, Republic of Korea (S.Y.K., Seungbok Lee, J.-H.C.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seungbok","family":"Lee","sequence":"additional","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."},{"name":"Department of Genomic Medicine, Seoul National University Hospital, Republic of Korea (S.Y.K., Seungbok Lee, J.-H.C.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0464-7605","authenticated-orcid":true,"given":"Ji Yeoun","family":"Lee","sequence":"additional","affiliation":[{"name":"Division of Pediatric Neurosurgery (J.Y.L., J.H.P., S.-K.K.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."},{"name":"Department of Anatomy and Cell Biology (J.Y.L.), Seoul National University College of Medicine, Seoul, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9603-5843","authenticated-orcid":true,"given":"Ji Hoon","family":"Phi","sequence":"additional","affiliation":[{"name":"Division of Pediatric Neurosurgery (J.Y.L., J.H.P., S.-K.K.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Seung-Ki","family":"Kim","sequence":"additional","affiliation":[{"name":"Division of Pediatric Neurosurgery (J.Y.L., J.H.P., S.-K.K.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9162-0138","authenticated-orcid":true,"given":"Jong-Hee","family":"Chae","sequence":"additional","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, Seoul National University College of Medicine, Republic of Korea."},{"name":"Department of Genomic Medicine, Seoul National University Hospital, Republic of Korea (S.Y.K., Seungbok Lee, J.-H.C.)."}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8509-4135","authenticated-orcid":true,"given":"Byung Chan","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Pediatrics (Seungjae Lee, W.J.K., S.Y.K., Seungbok Lee, J.-H.C., B.C.L.), Pediatric Clinical Neuroscience Center, Seoul National University Children\u2019s Hospital, 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