What do the signal characteristics of the spinal mass suggest this is?
With both high signal on T1w and T2w sequences, this is fatty tissue = lipoma.
Would another sequence be useful to confirm this?
STIR or another fat suppression technique would show signal drop out in this, confirming the presence of fat.
High T1w and T2w signal extradural mass, consistent with lipomatosis. Mass extent from T1 to T11, with excessive extradural fat around the sacral levels. Breathing artefact, but effacement of the thecal sac throughout the thoracic spine, with mid thoracic compression; no cord signal change.
Multilevel cervical and L5/S1 degenerative changes. Vertebral endplate fractures at T5, T8 and T11.