These include

# The multicentric form occurs in the lymph nodes.

# The gastrointestinal form occurs in the stomach, intestines, liver and lymph nodes in the abdomen.

# The mediastinal form occurs in the mediastinum, in front of the heart in an organ called the thymus. Hence this form of lymphosarcoma sometimes is called thymic lymphoma.

# The cutaneous form occurs in the skin.

# Acute lymphoblastic leukemia occurs when the disease starts in the bone marrow.

# Miscellaneous forms of lymphosarcoma are less common and include those that begin in the nervous system, nasal cavity or kidneys.

In the 19th and 20th centuries the affliction was called Hodgkin’s Disease, as it was discovered by Thomas Hodgkin in 1832. Colloquially, lymphoma is broadly categorized as Hodgkin’s lymphoma and non-Hodgkin lymphoma (all other types of lymphoma). Scientific classification of the types of lymphoma is more detailed.

Although older classifications referred to histiocytic lymphomas, these are recognized in newer classifications as of B, T or NK cell lineage. Histiocytic malignancies are rare and are classified as sarcomas