lymphoma
[C/U] Both
This term carries a heavy clinical weight and is almost exclusively used in medical or diagnostic settings. It evokes an image of the body's own defense system turning against itself, specifically targeting the white blood cells that manage immunity. While often grouped with leukemia in casual conversation, lymphoma specifically implies a malignancy that originates in the lymph nodes or spleen, creating a distinct diagnostic category for healthcare professionals.
Countable when referring to specific clinical types or individual cases of the disease. Uncountable when discussing the medical condition as a general pathology.