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©The Author(s) 2025.
World J Radiol. Dec 28, 2025; 17(12): 114595
Published online Dec 28, 2025. doi: 10.4329/wjr.v17.i12.114595
Table 1 Demonstration of the Zabramski classification system for cavernous malformations

T1
T2
GRE/SWI
Clinical manifestation
I (subacute hemorrhagic lesions)Hyperintense centerHyper or hypointense center, surrounded by a hypointense (hemosiderin) rim-Usually symptomatic
II (classic “popcorn-like” lesions)Heterogeneous signalHeterogeneous and hypointense (hemosiderin) rimHypointense (hemosiderin) rim with bloomingThe most prevalent type of cavernous malformation; recurrent asymptomatic or symptomatic episodes
III (chronic lesions)Hypointense or isointenseHypointense or isointenseHypointense rim with blooming (marked hemosiderin deposition)Clinically silent
IV (punctate lesions)Poorly seenPoorly seenSmall, punctate hypointense fociAsymptomatic


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