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Correlation between the size of recurrent tumors and allele frequencies of ctDNAs. Panels A and B indicate the time courses of cases 2 and 3, respectively. In each panel, the top images are enhanced CT before and after the changes. The timing of images are indicated just below the images. Bottom graph indicates the changes in AF (vertical axes) during time course (horizontal axes). Red arrows in the CT images indicates the recurrent tumors.
