What type of cancer originates in cells of the immune system?

The correct answer is linked to the nature of lymphoma as it specifically originates in the cells of the immune system, particularly the lymphocytes. Lymphocytes are a type of white blood cell that plays a significant role in the immune response, and when these cells undergo malignant transformation, they lead to lymphoma.

Myeloma, while also related to the immune system, specifically arises in plasma cells, which are differentiated B lymphocytes. Sarcoma originates in connective tissues, such as bone, cartilage, and muscle, rather than the immune system. Carcinoma is a cancer that arises from epithelial cells, which line the internal organs and cover the body’s surface, thus being distinct from immune cells. Therefore, lymphoma is the only type among the options that directly identifies a malignancy arising from immune system cells.