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Fig. 5B 55-year-old man with rectal cancer. Good tumor response to
chemoradiation. Axial T2-weighted image at same level as A after
chemoradiotherapy shows excellent response to treatment, with rectal tumor no
longer visible. Low-signal-intensity muscle wall fibrosis (arrow) is
evident. No mesorectal nodes are present. Histologic findings confirmed
complete tumor response to treatment and posttreatment scarring.