Lymphomas are a type of cancer that originates in the lymphatic system, which is part of the body's immune system. This system includes lymph nodes, spleen, and other organs that help fight infections. There are two main types of lymphomas: Hodgkin lymphoma and non-Hodgkin lymphoma, each with different characteristics and treatment approaches. Symptoms of lymphomas can include swollen lymph nodes, fever, night sweats, and unexplained weight loss. Diagnosis typically involves blood tests, imaging studies, and a biopsy of affected lymph tissue. Treatment options may include chemotherapy, radiation therapy, and targeted therapies, depending on the specific type and stage of the disease.