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Abstract
Human Germinal Center-associated Lymphoma (HGAL) is a germinal center (GC) B-cell marker associated with a favorable outcome in diffuse large B-cell and classic Hodgkin lymphomas (CHL). To test its potential role in GC function, 75 cases involving GC disruption including 23 progressive transformation of germinal centers (PTGC), 25 follicle lysis and 27 Castleman disease (CD) were studied. HGAL protein expression uniformly correlated with GC B-cells in all except a subset of hyaline-vascular CD that showed severe regression of GCs. HGAL staining highlighted dismantled GCs in PTGC, in contrast to weak or absent CD10 and BCL6 staining. In follicle lysis, HGAL staining was comparable to that of CD10, BCL6, and CD21 in highlighting lysed follicles. Our findings show that HGAL protein expression effectively discriminates clusters of GC B-cells in disrupted follicles. Its persistence in disrupted GCs, suggests that it may be necessary for GC maintenance and supports its proposed role of confining B-cells to the GC microenvironment.
View details for DOI 10.1097/PAI.0b013e3181f89a4d
View details for Web of Science ID 000289279800011
View details for PubMedID 21475040