probably the diagnosis is not mentioned correctly. can you please mention the detail pathology report. I doubt this is lymphoma
or some other disease. has she got any swelling in any other area like armpit, neck, opposite groin. even it came as lymphoma detail imaging like chest , abdomen CT scan
to be done. if necessary bone marrow biopsy
to be done for proper staging. then treatment will be planned accordingly. do not worry. lymphoma has got good treatment option.