CD21 antibody has been shown to label follicular dendritic cells, as a means of illustrating the phenomenon of follicular colonization in marginal zone lymphoma. Follicular dendritic cell markers such as SR-100, CD21 or CD35 may be used for the differential diagnosis in tonsillar masses. CD21 has also been used in proving cell lineage in some rare follicular dendritic cell tumors. CD21 has been shown to be a reliable marker of follicular dendritic cells in angioimmunoblastic T-cell lymphomas.
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1. Martins PN, et al. Hepatobiliary Pancreat Dis Int. 2011 Aug; 10(4):443-5. 2. Suhail Z, et al. J Coll Physicians Surg Pak. 2010 Jan; 20(1):55-6. 3. Guisado Vasco P, et al. Int J Clin Exp Pathol. 2009 Dec;3(2):189-202. 4. Troxell ML, et al. Appl Immunohistochem Mol Morphol. 2005 Dec; 13(4):297-303.