Application of intraoperative laparoscopic ultrasound guidance combined with Sonazoid contrast in surgical treatment of colorectal liver metastasis

BACKGROUND Contrast-enhanced ultrasound (CEUS) performed intraoperatively for colorectal cancer liver metastases can detect concealed liver metastases not identified during preoperative examinations or routine intraoperative ultrasound. This capability is critical for determining the appropriate surgical approach. AIM To explore the advantages of Sonazoid-CEUS (S-CEUS) over gray-scale ultrasound (GSUS) for tumor localization during laparoscopic ultrasound-guided microwave ablation (MWA) in color