How Can We Identify the Presence of Metastases?
Rectal cancer most commonly metastasizes to the liver, developing hepatic metastases either synchronously or metachronously. The lung is the second most common organ to harbor rectal cancer metastases. Brain and bone metastases are uncommon. Imaging plays an important role in the workup of patients with mRC by helping enumerate the number and sites of metastases, determine resectability, assess response to systemic and liver-directed therapies, and detect disease recurrences. Concurrent with advances in the treatment of rectal cancer, there have been major advances in radiology, with the development of new imaging modalities, functional imaging techniques, and contrast media.
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