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Fig 1. A 54-year-old woman with a cavernous angioma. A, An axial T2-weighted image (TR/TE/NEX, 3700/104/2 ms) shows a hemorrhagic mass with heterogeneous signal intensity and a severe surrounding edema in the right temporal lobe. B, An unenhanced T1-weighted image (TR/TE/NEX, 467/8/1 ms) demonstrates obvious hyperintensity within the vasogenic edema (T1 hyperintense perilesional signal intensity sign; long arrows). The T1 hyperintense perilesional signal intensity sign is not obviously observed in the peripheral area of the vasogenic edema (short arrow). C, An enhanced T1-weighted image (TR/TE/NEX, 467/8/1 ms) shows heterogeneous enhancement of the round mass at the center of hemorrhagic mass. D, Surgery was performed 1 day after MR imaging. A histologic photomicrograph shows a relatively well-demarcated cavernous angioma with hematoma formation (arrow) and microscopic diffuse perilesional hemorrhage in the surrounding white matter (hematoxylin-eosin, original magnification, x40). The inset shows hemorrhage with infiltration of siderophages (arrow; hematoxylin-eosin, original magnification, x200).
