MRI lumbar spine, sacrum and pelvis
Pre-and post contrast sequences have been obtained, with comparison to the previous MRI.
The sacrum is again truncated at the S3 level, consistent with previous tumour debulking. The lobulated T2 hyperintense tumour in the ischiorectal fossae, right piriformis and abutting partially resected sacrum remains in situ, but the large component which had previously extended inferolaterally posterior to the right ischial tuberosity and right hip joint has been debulked. Mild oedema in the operated region is expected postsurgical finding.
There is stable indentation of the mesorectal fascia by the right ischiorectal fossa component of tumour. No proximal extension into the remaining portion of the sacral canal.
Conclusion: Debulking of the right gluteal portion of the large sacral chordoma.