My mom told me she has lymphoma, or cancer of the lymph nodes. I'm really scared. Can someone tell me about lymphoma?

Here is some really good, comprehensive info: Lymphoma (Hodgkin's Disease and Non-Hodgkin's Lymphoma) Types, Symptoms, Prognosis, Treatment, Stages and Survival Rates by eMedicineHealth.com (http://www.emedicinehealth.com/lymphoma/article_em.htm)