<unk>  is a group of blood and lymph tumors that develop from lymphocytes (a type of white blood cell). In current usage the name usually refers to just the cancerous versions rather than all such tumours. Signs and symptoms may include enlarged lymph nodes, fever, drenching sweats, unintended weight loss, itching, and constantly feeling tired. The enlarged lymph nodes are usually painless. The sweats are most common at night. Many subtypes of<unk> s are known. The<unk>  main categories of<unk> s are the non-Hodgkin<unk>  (NHL) (90% of cases) and Hodgkin<unk>  (HL) (10%). The World Health Organization (WHO) includes<unk>  other categories as types of<unk>  – multiple myeloma and immunoproliferative diseases.<unk> s and leukemias are a part of the broader group of tumors of the hematopoietic and lymphoid tissues. Risk factors for Hodgkin<unk>  include infection with Epstein–Barr virus and a history of the disease in the family. Risk factors for common types of non-Hodgkin<unk> s include autoimmune diseases, HIV/AIDS, infection with human T-lymphotropic virus, immunosuppressant medications, and some pesticides. Eating large amounts of red meat and tobacco smoking may also increase the risk. Diagnosis, if enlarged lymph nodes are present, is usually by lymph node biopsy. Blood, urine, and bone marrow testing may also be useful in the diagnosis. Medical imaging may then be done to determine if and where the cancer has spread.<unk>  most often spreads to the lungs, liver, and brain. Treatment may involve<unk>  or more of the following: chemotherapy, radiation therapy, proton therapy, targeted therapy, and surgery. In some non-Hodgkin<unk> s, an increased amount of protein produced by the<unk>  cells causes the blood to become so thick that plasmapheresis is performed to remove the protein. Watchful waiting may be appropriate for certain types. The outcome depends on the subtype with some being curable and treatment prolonging survival in most. The five-year survival rate in the United States for all Hodgkin<unk>  subtypes is 85%, while that for non-Hodgkin<unk> s is 69%. Worldwide,<unk> s developed in 566,000 people in 2012 and caused 305,000 deaths. They make up 3–4% of all cancers, making them as a group the seventh-most common form. In children, they are the third-most common cancer. They occur more often in the developed world than the developing world.
Lymphoma
Cat-scratch disease
Thymoma
Paracoccidioidomycosis
Thyroid nodule
Meningioma
Myoma
Branchial cleft cyst