Positron emission tomography
Preoperative evaluation involves imaging of the liver and its metastases, for example with ultrasound, computed tomography or magnetic resonance imaging. Positron emission tomography can be useful to check the entire body for metastases, although the test can be falsely normal with small lesions or preoperative chemotherapy. Baseline blood tests typically include liver function tests and tumour markers. During surgery, intraoperative ultrasound can aid the surgeon to find additional metastases.