1) Hodgkin Lymphoma (HL)
It is characterized by the presence of Reed-Sternberg cells. It generally tends to spread in an orderly manner from one lymph node to another.
2) Non-Hodgkin Lymphoma (NHL)
It is more common and includes many subtypes (e.g., diffuse large B-cell lymphoma, follicular lymphoma). It generally tend to spread in more predictable pattern than Hodgkin Lymphoma.