Figure 1.

Swimmer’s plot for stage IV colorectal cancer patients. Each row represents a patient with colorectal cancer and the time from the first evaluation (baseline) to the last time point with data. For each blue filled triangle, there is a positive image modality [either magnetic resonance imaging (MRI)/computed tomography (CT) or positron emission tomography (PET)–CT] denoting disease presence. Blue open triangles represent a negative image modality that shows the absence of disease. The black filled circles represent a positive ctDNA value, and the red open circles represent a negative ctDNA value. The x-axis represents the months of surveillance, with month 1 being the baseline observation (after January 2020). Each number in the y-axis represents a patient.