<unk>  is  a type of cancer that originates in lymphocytes (a type of white blood cell in the vertebrate immune system). There are many types of<unk> .<unk> s are part of the broad group of diseases called hematological neoplasms. It was discovered by Thomas Hodgkin in 1832 and was called Hodgkin's Disease throughout the 19th and 20th centuries. Colloquially,<unk>  is broadly categorized as Hodgkin's<unk>  or non-Hodgkin<unk>  (all other types of<unk> . Scientific classification of the types of<unk>  is more detailed. Although older classifications referred to histiocytic<unk> s, these are recognized in newer classifications as of B, T or NK cell lineage. Histiocytic malignancies are rare and are classified as sarcomas.
Lymphoma
Thymoma
Thyroid nodule
Thyroid adenoma
Thymic carcinoma
Non-Hodgkin lymphoma
Osteoma
Hodgkin's lymphoma