Annotated image
True or false: myxopapillary ependymomas almost always enhance following administration of contrast.
True, although how easily this is to see depends on the amount of haemorrhage.
From which structure(s) and cell of origin do they arise?
They are thought to arise from the ependymal glia of the filum terminale or conus medullaris.
What component (histological) accounts for high T2 signal?
Histologically, they contain papillary elements in a myxoid background (which accounts for high T2 signal), admixed with ependymoma-like cells.
The intradural mass ( * ) demonstrates mixed low and high T2 signal, with signal loss (blue arrows) best seen on STIR imaging suggesting blood products. The mass demonstrates enhancement.