Multicentric lymphoma is a type of cancer that affects the lymphatic system, characterized by the presence of multiple tumors in various lymph nodes throughout the body. It is often classified as a form of non-Hodgkin lymphoma, which can arise from different types of immune cells. Symptoms may include swollen lymph nodes, fever, weight loss, and night sweats. This condition can occur in both adults and children, and its exact cause is not fully understood. Diagnosis typically involves imaging tests, biopsies, and blood tests. Treatment options may include chemotherapy, radiation therapy, or targeted therapies, depending on the specific type and stage of the lymphoma.