CT Pelvis (2 years ago)
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The known, lobulated, moderately well-defined, infiltrating soft tissue mass is again demonstrated involving the tip of the coccyx and extending inferiorly and anteriorly into both ischiorectal fossae as well as posteriorly into the surrounding fat, deep to the superior aspect of the natal cleft. The perirectal fat, although narrowed in places, is preserved with no definite breach.
The mass measures up to 9.8cm in maximum craniocaudal dimension and inferiorly on the right side measures up to 7.7 x 4.2cm.
Superiorly, there is evidence of invasion of the coccyx. Ill-defined soft tissue infiltrate continues superiorly into the right side and midline of the coccyx over a distance of approximately 5.2cm with associated erosion.
No free intraperitoneal fluid or focal collection. No pelvic or inguinal lymphadenopathy.
Features suggest a previous TURP.
Mild degenerative change in the lower lumbar spine and sacroiliac joints bilaterally.
Conclusion: The features would be in keeping with the clinical history of recurrent chordoma and are unaltered from the recent MRI.