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RESEARCH PRODUCT

CD27 distinguishes two phases in bone marrow infiltration of splenic marginal zone lymphoma.

Stefano PileriVito FrancoMarco PaulliStefano AscaniM. SalvatoA. M. Florena

subject

AdultMalePathologymedicine.medical_specialtyHistologybone marrowLymphomaBiopsyNaive B cellsplenic marginal zone lymphomaSplenic NeoplasmSpleenPathology and Forensic MedicineBiopsyintrasinusoidal infiltrationmedicineHumansSplenic marginal zone lymphomaCD27naive and memory B cellsAgedAged 80 and overmedicine.diagnostic_testbusiness.industrySplenic NeoplasmsGeneral MedicineMiddle Agedmedicine.diseaseBone Marrow NeoplasmImmunohistochemistryTumor Necrosis Factor Receptor Superfamily Member 7bone marrow; CD27; intrasinusoidal infiltration; naive and memory B cells; splenic marginal zone lymphomamedicine.anatomical_structureBone marrow neoplasmFemaleBone marrowbusinessBone Marrow NeoplasmsInfiltration (medical)

description

Aims:  To investigate CD27 expression in splenic marginal zone lymphoma (SMZL), an indolent low-grade B-cell lymphoma with constant involvement of the bone marrow, especially with an intrasinusoidal pattern. It is not clear if the neoplastic clone is composed of virgin or somatically mutated B cells. CD27 is reported to be a hallmark of memory B cells. Methods and results:  We evaluated 64 bone marrow biopsy specimens (BMBs) from 36 patients with SMZL for the expression of CD27. For comparison, splenectomy specimens of patients with traumatic splenic rupture or with SMZL were used. All BMBs showed lymphomatous infiltration. When located in the marrow sinusoids, neoplastic cells were CD27– in all cases and therefore corresponded to naive B cells. In nodular/interstitial infiltration, the cells were CD27+ and therefore corresponded to memory B cells. No difference in immunohistochemical expression of B and T antibodies was found between intrasinusoidal and interstitial/nodular infiltration. CD27 was constantly expressed in the splenic marginal zone of normal spleen, surgically removed for trauma, and in seven out of 10 spleens with SMZL. Conclusion:  We propose the existence of two different phases of neoplastic progression with, first, expansion of a virgin B clone in the bone marrow and, following exposure to antigen, a re-colonization of the bone marrow.

yearjournalcountryeditionlanguage
2004-01-01
10.1111/j.1365-2559.2004.01857.xhttp://hdl.handle.net/11391/160038