Bowel and bladder dysfunction.
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Sagittal and axial STIR show a large, well-defined soft tissue mass engulfing the distal sacrum and coccyx, with extension into the pre-sacral space and dorsal soft tissues. The mass is hyperintense with linear hypointense septa.
This case illustrates an histologically proven sacrococcygeal chordoma.
Chordomas are destructive bone tumours with large soft tissue component. Their distribution follow: Sacrococcygeal > spheno-occipital > mobile spine. Usually they are presented with an hyperintense T2WI signal, with multiple septa. They show normal or decreased uptake on bone scan
Differential diagnoses include:
- giant cell tumor