Ultrasound-Guided Preoperative SAVI SCOUT Radar Reflector Localization of Soft Tissue Masses in the Musculoskeletal...

Area of Science:

• Oncology
• Surgical Oncology
• Musculoskeletal Imaging

Background:

• Accurate preoperative localization of soft tissue masses is crucial for effective surgical resection.
• Minimally invasive localization techniques aim to improve surgical outcomes and reduce complications.
• Wireless radar reflectors offer a potential solution for precise tumor margin definition.

Purpose of the Study:

• To assess the impact of ultrasound-guided preoperative localization using a wireless radar reflector (SAVI SCOUT) on operative times.
• To compare reoperation rates between patients with and without preoperative localization for soft tissue masses.
• To evaluate the efficacy of SAVI SCOUT in improving surgical precision for musculoskeletal tumors.

Main Methods:

• A retrospective review compared 24 patients who underwent SAVI SCOUT localization with 24 matched controls.
• Patients were matched based on demographics, comorbidities, tumor location, histopathology, and case complexity.
• Operative times, imaging, clinical details, and reoperation rates were analyzed.

Main Results:

• No significant difference in median operative time was observed between the SAVI SCOUT group (52.0 minutes) and the control group.
• The SAVI SCOUT group had zero reoperations, while the control group required five reoperations for positive margins (p=0.056).
• Common lesions included metastatic melanoma, intramuscular myxoma, liposarcoma, and metastatic leiomyosarcoma.

Conclusions:

• Preoperative localization with SAVI SCOUT did not substantially decrease operative times for soft tissue masses.
• A trend towards reduced re-resection rates was observed in the localized group, suggesting potential benefits in surgical margins.
• Further investigation may be warranted to confirm the impact of radar reflector localization on reoperation rates.