Dictionary of Cancer Terms
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SCID
A rare, inherited disease that is marked by a lack of B lymphocytes (white blood cells that make antibodies and help fight infections) and a lack of T lymphocytes (white blood cells that attack virus-infected cells, foreign cells, and cancer cells). Patients with this disease have a high risk of developing viral, bacterial, and fungal infections. Also called severe combined immunodeficiency disease.
Source: National Cancer Institute Dictionary of Cancer Terms, available at www.cancer.gov/dictionary.