Liver PRETEXT Stage 1; drawing shows two livers. Dotted lines divide each liver into four vertical sections of about the same size.  In the first liver, cancer is shown in the section on the far left.  In the second liver, cancer is shown in the section on the far right.
PRETEXT Stage 1. Cancer is found in one section of the liver. Three sections of the liver that are next to each other do not have cancer in them.