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. 2024 Feb 28;34(3):511–521. doi: 10.1055/s-0044-1779587

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Indian Radiological Association. This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ )

This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives License, which permits unrestricted reproduction and distribution, for non-commercial purposes only; and use and reproduction, but not distribution, of adapted material for non-commercial purposes only, provided the original work is properly cited.

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Fig. 7 — Magnetic resonance (MR) images of a 42-year-old male patient with an acute severe headache. (A) Sagittal T2-weighted image (T2WI) demonstrates a cavernous malformation (CM) in the cerebellopontine angle with peripheral hypointense hemosiderin ring ( arrow ). (B) Axial fluid-attenuated inversion recovery (FLAIR) sequence demonstrates a CM and perimesencephalic subarachnoid hemorrhage ( arrowheads ). (C) The lesion is heterogeneously hyperintense on nonenhanced T1-weighted image (T1WI) due to intralesional recent hemorrhage. (D) No enhancement was observed on axial contrast-enhanced T1WI. (E) Recent hemorrhages within the CM cause diffusion restriction on diffusion-weighted imaging (DWI) as hyperintense signals. (F–H) Susceptibility-weighted images (SWIs) show multiple intracranial CMS with “blooming artifacts” ( arrows ).