Mimicking Subarachnoid Hemorrhage or a CP Angle Mass
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Findings Relating to the Mimic
Bilateral linear calcified choroid plexus in the 4th ventricle extending laterally though the foramina of Luschka, more prominent on the right.
This finding has the eponymous name of “Bochdalek’s flower basket”
The foramina of Luschka are paired foramina located in the lateral recesses of the fourth ventricle that connect the fourth ventricle and the cerebellopontine cistern.
Usually choroid is easy to differentiate from hemorrhage given the characteristic location and physiologic calcification. Using bone windows and measuring point value attenuation may help you confidently identify calcification associated with choroid.
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