Broken Hearted - if your husband has cancer in the lymph nodes I would guess that its a form of Non Hodgkins Lymphoma. I'm not a doctor or an expert in anything like this but I do know a family member who has suffered from this for many years and has had it held at bay successfully through chemotherapy.
Its not a nice thing, they say its incurable, but in many ways, so is life. They do seem to be able to prevent it causing ongoig problems so I will cross my fingers for you and hope that your hubby remains fit and healthy even with this illness.
My best wishes to both of u