The lymph nodes in the groin (femoral or inguinal lymph nodes) may swell from an injury or infection in the foot, leg, groin
, or genitals. In rare cases, testicular cancer, lymphoma, or melanoma may cause a lump
in this area"
By altered stool, do you mean that bowel movement still leaves you feeling as if you are still not done?
When was your last IVIg treatment?