|| Immunoblastic lymphoma is one of 3 morphologic variants of diffuse large B cell lymphoma (DLBCL). The other 2 variants are centroblastic lymphoma and anaplastic B-cell lymphoma.|
The disease is not recognized as a separate entity in the WHO classification (2008).
|Phenotype / cell stem origin
|| The postulated normal counterpart is a germinal centre B cell or an activated post germinal centre B cell. |
The immunophenotype may help distinguishing germinal centre-derived DLBCL from activated B-cell derived DLBCL, the former being CD10+ (>30% of the cells), or BCL6+ and IRF4/MUM1-.
The immunophenotype reproduces that of DLBCL, with pan B-cell markers positive, surface and/or cytoplasmic Ig positive in the majority of the cases. The CD30 antigen is negative. CD5 is positive in 10% of the cases. CD10 is expressed in approximately half of the cases.
|Epidemiology|| It accounts for approximately 1/4 of DLBCL.|
|Clinics|| The disease runs an aggressive course, as all DLBCL.|
|Pathology|| The lymph node section shows an overwhelming infiltrate (>90%) by medium-to-large size cells with centrally located nucleolus and fairly abundant basophilic cytoplasm.|
|Treatment|| Chemoimmunotherapy using anti CD20 monoclonal antibody rituximab in combination with CHOP or CHOP-like regimens is the standard of care.|
|Prognosis|| Chemoimmunotherapy may cure 40-60% of the cases depending on age and risk factors.|
| Clinicopathogenetic significance of chromosomal abnormalities in patients with blastic peripheral B-cell lymphoma. Kiel-Wien-Lymphoma Study Group.|
| Schlegelberger B, Zwingers T, Harder L, Nowotny H, Siebert R, Vesely M, Bartels H, Sonnen R, Hopfinger G, Nader A, Ott G, Muller-Hermelink K, Feller A, Heinz R.|
| Blood. 1999 Nov 1;94(9):3114-20.|
| Diffuse large B-cell lymphoma, not otherwise specified.|
| Stein H, Warnke RA, Chan WC, Jaffe ES, Chan JKC, Gatter KC, Campo E.|
| Swerdlow SH, Campo E, Harris NL, Jaffe ES, Pileri SA, Stein H, Thiele J, Vardiman JW, ed. WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues. WHO press, 4th ed. Lyon: IARC. 2008; pp 233-237.|