B-cell lymphoma, leg weakness/numbness There are small subcentimeter amorphous foci of increased signal within the left sacral wing on the fat suppressed T2 sequence. These are less conspicuous on T1 sequences and demonstrate minimal enhancement following contrast administration. While we cannot entirely exclude the possibility of small lymphomatous deposits, these may simply represent components of small intraosseous vascular malformation, given their clustering in the sacral wing. Similar but smaller foci are present in the right sacral wing. There are no additional bony lesions within the pelvis. Symmetric intermediate signal intensity within the proximal femora bilaterally are thought to represent areas of red marrow.A small Tarlov cyst is seen posterior to the right S2 nerve root and is not necessarily of any current clinical significance. The muscles of the pelvis are normal in signal intensity and caliber. The hip and sacroiliac joints are normal with no evidence of synovitis or effusion.A fat-containing lesion is noted within the left adnexa perhaps representing a dermoid cyst / mature teratoma.
1. Small amorphous foci of signal abnormality with minimal enhancement noted within the sacral wings, left greater than right. These may represent small vascular malformations although we cannot entirely exclude the possibility of small lymphomatous deposits. Follow-up with serial imaging may be considered.2. Fat-containing left adnexal lesion which may represent a mature teratoma / dermoid cyst. Referral to gynecology may be considered.