Metastatic rectal cancer. Coloured positron eletron tomography (PET) scans through the torso of a patient with rectal cancer (white, right). The cancer has spread (metastasised) to the liver and other organs in the abdomen (centre), where the cancerous cells will resemble those from the rectum (primary cancer). Treatment of metastasised cancer includes a combination of radiotherapy, chemotherapy and surgery, and depends on the type of primary cancer, as well as the size and location of the metastasised cancer.
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