Lymphoma is a type of cancer that begins in the lymphatic system, which is part of the body's immune system. It occurs when lymphocytes, a kind of white blood cell, grow uncontrollably. There are two main types of lymphoma: Hodgkin lymphoma and non-Hodgkin lymphoma. Symptoms can include swollen lymph nodes, fever, weight loss, and night sweats. Treatment for lymphoma often involves chemotherapy, radiation therapy, or sometimes a stem cell transplant. Early detection is important for better outcomes, so if someone experiences unusual symptoms, they should consult a healthcare professional. With advancements in medicine, many people with lymphoma can lead healthy lives.