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A typical sign is demonstrated in the lumbosacral canal; do you know what it is?
The compression of the thecal sac at this level creates a "Y-sign" which is typical for extradural lipomatosis.
Interval reduction in extent of lipomatous mass (with signal loss confirmed on STIR sequences).
CSF effacement and cord compression at T5-T9 levels (reduced from previous).
"Y-sign" demonstrated on transverse lumbar sequences.