Intraoperative abdominal ultrasound in oncologic imaging

Figure 2 A 73-year-old male with colorectal cancer and indeterminate hepatic lesion on computed tomography, suspicious for metastasis. A: Axial contrast-enhanced computed tomography (CT) image shows small hypodense lesions in the right liver, possibly representing cysts; B: Axial contrast-enhanced CT image more inferiorly in the same patient reveals a subcentimeter lesion, deemed too small to be accurately characterized. Metastasis was not excluded; C: Intraoperative ultrasound image in the longitudinal plane shows a homogeneously hypoechoic lesion in the dome of the liver consistent with a cyst; D: Longitudinal Intraoperative ultrasound image more inferiorly shows a solid hypoechoic lesion in the inferior right liver, consistent with a metastasis.