A 82-year old patient with past history of colon cancer had developed a metachronous CRLM that had been treated with MWA using US guidance in 2021. In 2023 the patient presented with a large crescent-shaped local recurrence (55mm) in segment VIII. Due to the possibility of planning and executing large overlapping ablation zones, a CAS-One IR MWA was chosen over a hemi-hepatectomy and radiation therapy, with curative intent. A total of six ablation zones (the 6th on a separate tumor) were planned and executed using the Medtronic Emprint system. Segmentation of the vasculature and surrounding organs helped plan trajectories and ablation zones to minimize risk. The 6-week post-intervention MRI highlights the success of this treatment.
Planning scan with vasculature segmented (red: segmentation of the tumorous region, orange: 5 mm safety margin, green: overlapping ablation zones)
Planning scan with 3D reconstruction of estimated ablation zones and organ segmentation (green: overlapping ablation zones)
6-week post-procedure MRI in axial and coronal view showcasing no local recurrence
Name: Dr. Arash Najafi
Institution: Kantonspital Winterthur, Switzerland
Patient sex: Female
Initial condition:
Original metastasis was 55mm, recurrence was 28mm
Treatment:
Result:
Learn more about the stereotactic navigation system CAS-One IR.