Figure 4. Partial regression of the inguinal metastasis during rituximab therapy.

CT scans of the inguinal region before the start of any treatment (day -82), dacarbazine plus DNCB treatment (day -12), and after 7 and 9 courses of rituximab injections. The inguinal metastasis progressed during chemotherapy from 15 mm to 19 mm in diameter; rituximab treatment produced substantially regression to 12 mm after 7 courses and to 9 mm after 9 courses of treatment, i.e., within 24 weeks. The solitary metastasis was stable and removed by surgery.