The radiologist thinks this is just choroid plexus and that the passage of the cerebrospinal fluid is not hindered in any way since he can’t see any diluting of the ventricles. Can that really be the case?

By the way, I know about the septum pellucidum cyst. Same radiologist can’t say for sure whether it is a communicating one or a non-communicating one since the wall separating it from the foramen of Monroe may be so thin it doesn’t show up on the MRI. Personally I think it is obvious since one can follow a shadow from the cyst in the first picture through where the wall should have been, and down into the foramen of Monroe. This would have been more obvious if there wasn’t a limit of 5 pictures per thread.

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