Classic Hodgkin lymphoma (cHL) is a relatively rare cancer of the immune system that contains abnormal B lymphocytes called Reed-Sternberg cells in the lymph nodes. cHL is the most common type of Hodgkin lymphoma, accounting for 95% of all Hodgkin lymphoma cases. The other 5% of Hodgkin lymphoma cases are nodular lymphocyte-predominant Hodgkin lymphoma.
