Hodgkin's lymphoma is a cancer of the lymphatic system characterized by abnormal Hodgkin and Reed-Sternberg cells. It has various stages and types, and common causes include past Epstein-Barr infection, age 15-30 or over 50, male gender, and family history. Signs include swollen lymph nodes, fatigue, fever, night sweats, weight loss, and itching. Diagnosis involves lymph node biopsy to check for Reed-Sternberg cells. Treatment options include chemotherapy, radiation therapy, and stem cell transplantation, with nursing care focused on managing side effects, educating patients, and providing support.