Fig. 4

An example of a partial lymphoma response after treatment with residual images that remain stable on CT scans during the monitoring. a Homogeneous mass within superior-lateral quadrant is observed at diagnosis of lymphoma on non-contrasted CT. After treatment, marked reduction of the size is noted, although residual circled images keep stable in the following checks. b First contrasted CT after 8 months treatment. c, d Annual checks present no changes on non-contrasted CT