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Table 1:

Characteristics of 10 patients with RSCI infarct

No.Age (yr)Thromb. IA/IVStroke EtiologyaInfarct TerritoryOccluded VesselHTbMR Imaging Characteristics of Qualifying Lesions (RSCI)Locationc
Pattern TypeADCN RSCIHypo-GREMax. Diam. (mm)
163IVUndeterminedR Carot.M2HI-1Gad +/DWI-N1No41Cortical/same arterial territory
263IALV Dis.R Carot.M1Gad−/DWI+D1No5Cortical/same arterial territory
377IAOtherR Carot.ICPH-2Gad−/DWI+D2No5Cortical/same arterial territory
442IAOtherR Carot.M1PH-1Gad+/DWI+D4No15Multiple territories
563IVLV Dis.L Carot.CC+M1HI-2Gad−/DWI+D1No7Cortical/same arterial territory
674IV + MTLV Dis.R Carot.CC+M1PH-1Gad+/DWI+D3No15Cortical/same arterial territory
749IVUndeterminedL Carot.CC+M1Gad+/DWI−N1No11Cortical/same arterial territory
836IAOtherBABAGad−/DWI+D1No23Cortical/same arterial territory
940IACardioembolicL Carot.M1Gad+/DWI−N2No13Cortical/same arterial territory
1078IVLV Dis.L Carot.CC+M1HI-2Gad+/DWI−N1Yes15Cortical/other arterial territory
  • Note:—IA indicates intra-arterial; Thromb., thrombolysis; HT, hemorrhagic transformation; N, normal ADC compared with the contralateral side; D, decreased ADC compared with contralateral side; N RSCI, number of areas of RSCI per patient; hypo-GRE, hypointensity on T2 gradient-echo-T2WI within the RSCI area; Max. Diam., maximum diameter of RSCI in millimeters measured on axial FLAIR; LV Dis., large-vessel disease etiology; Other, other etiology; R Carot., right internal carotid artery; L Carot., left internal carotid artery; M2, second segment of the middle cerebral artery; M1, first segment of the middle cerebral artery; IC, intracranial internal carotid artery; CC, cervical internal carotid artery; BA, basilar artery; MT, mechanical thrombectomy; Gad+, gadolinium enhancement on T1WI; Gad−, lack of gadolium enhancement on T1WI.

  • a According to the TOAST classification, patients younger than 56 years with associated patent foramen ovale and atrial septum aneurysm (patient 9) were classified under “cardioembolic.” “Other” etiology was myeloproliferative-disorder-associated coagulopathy in patient 3; paraneaoplastic coagulopathy in patient 4; and vertebral artery dissection in patient 8.

  • b According to the ECASS definition.4

  • c Location of the RSCI was compared with the acute infarct arterial territory.