The patient is a 52-year-old woman who presented to the physician with hip pain. Imaging and biopsy confirmed the diagnosis of a Chondrosarcoma tumor.
Pre-operative simulation and planning
Using MRI imaging, the locations of the cuts on the patient’s bone in the pubis and ischium were identified. The patient’s tumor extended to the SI joint and required reconstruction.
Based on the patient’s contralateral side, the overall geometry of the prosthesis was obtained. The version and inclination angles of the cup were also applied according to the patient’s healthy side.
The positions for 4.5 mm screws at the prosthesis connection to the sacroiliac joint and 3.5 mm screws at the connection to the pubis and ischium were designated for the prosthesis fixation, and holes were made on the prosthesis for muscle attachment. A porous structure was created at the prosthesis-bone interfaces to promote bone tissue formation.
The part was manufactured using a 3D printer and, after post-processing, cleaning, and sterilization with gamma radiation, it was provided to the physician.
Tumor images
The bone was cut using a guide designed based on the patient’s anatomy, and the tumor was removed.
Images after surgery
The prosthesis was placed on the pubis, ischium, and sacrum bones according to the planning, and fixation was achieved through the pre-designated screw holes.
Post-operative status
Nine months after the surgery, no signs of recurrence or new involvement were observed in the patient’s PET scan.