Reed–Sternberg cells (also known as lacunar histiocytes for certain types) are different giant cells found with light microscopy in biopsies from individuals with Hodgkin's lymphoma (aka Hodgkin's disease; a type of lymphoma). They are usually derived from B lymphocytes, classically considered crippled germinal center B cells, meaning they have not undergone hypermutation to express their antibody. Seen against a sea of B cells, they give the tissue a moth-eaten appearance.
Classification of Hodgkin's is based on the reactive cell mixture. Immunomarkers are used eg. CD 15 and 30.
Reed–Sternberg cells are large and are either multinucleated or have a bilobed nucleus with prominent eosinophilic inclusion-like nucleoli (thus resembling an "owl's eye" appearance). Reed–Sternberg cells are CD30 and CD15 positive, usually negative for CD20 and CD45. The presence of these cells is necessary in the diagnosis of Hodgkin's lymphoma – the absence of Reed–Sternberg cells has very high negative predictive value. They can also be found in reactive lymphadenopathy (such as infectious mononucleosis, carbamazepine associated lymphadenopathy) and very rarely in other types of non-Hodgkin lymphomas.
A special type of Reed–Sternberg cells (RSCs) is the lacunar histiocyte, whose cytoplasm retracts when fixed in formalin, so the nuclei give the appearance of cells that lie with empty spaces (called lacunae) between them. These are characteristic of the nodular sclerosis subtype of Hodgkin's lymphoma.
Mummified RSCs (compact nucleus, basophilic cytoplasm, no nucleolus) are also associated with classical Hodgkin's lymphoma while popcorn cells (small cell with hyper-lobulated nucleus and small nucleoli) are lymphohistiocytic (L-H) variant of Reed Sternberg cells and are associated with Nodular lymphocyte predominant Hodgkin's lymphoma (NLPHL).
- Hartlapp I, Pallasch C, Weibert G, Kemkers A, Hummel M, Re D (February 2009). "Depsipeptide induces cell death in Hodgkin lymphoma-derived cell lines". Leuk. Res. 33 (7): 929–36. doi:10.1016/j.leukres.2008.12.013. PMID 19233470.
- Reed D. On the pathological changes in Hodgkin's disease, with special reference to its relation to tuberculosis. Johns Hopkins Hosp Rep 1902;10:133-96.
- Sternberg C. Uber eine eigenartige unter dem Bilde der Pseudoleukamie verlaufende Tuberculose des lymphatischen Apparates. Ztschr Heilk 1898;19:21–90.
- Mitchell, Richard Sheppard; Kumar, Vinay; Abbas, Abul K.; Fausto, Nelson. Robbins Basic Pathology. Philadelphia: Saunders. ISBN 1-4160-2973-7. 8th edition.