(v) The nature and number of portal tract infiltrate: plasma cells, eosinophils, neutrophils, macrophages, and
immunoblast cells
Tumor proliferation was composed of large cells with plasmablast's or
immunoblast's morphology, disposed in small clusters, large sheets, or nodules [1-7].
The HCV recombinant
immunoblast assay (RIBA) can be used as a confirmatory test; however it is no longer regularly used in clinical practice.
All patients with a physician diagnosis of hepatitis C were included, whether the diagnosis had been confirmed by liver biopsy or polymerase chain reaction (PCR) testing or by either positive recombinant
immunoblast assay (RIBA) testing or indeterminate RIBA testing and the presence of 1 or more risk factors.
It shows area of necrosis with intervening preserved area along with scattered lymphocytes mixed with
immunoblast & blood vessels.
These large cells include centroblasts and
immunoblasts with rounded nuclear contours (Figure 4, C).
Although DLBCL can occur in childhood, the incidence generally increases with age and roughly half of patients are over the age of 60.[2] DLBCL arises from a mature B-cell and is usually comprised of cells resembling centroblasts or
immunoblasts, which are two distinct types of activated B-cells.
Most nucleoli were prominent, often peripherally located adjacent to the nuclear membrane (centroblasts), with few large vesicular nucleoli, solitary and centrally located (
immunoblasts).
For DLBCL, lesions are characterized by an intense cellular infiltration of the lamina propria and the predominant cells resemble either centroblasts (large noncleaved cells) or
immunoblasts [16].
Nevertheless, reactive hyperplasia is typically marked by a predominance of large cells and
immunoblasts, sometimes even with atypical forms (common in clinical conditions associated with viral infections, such as infectious mononucleosis).
Microscopically, tumor cells of PCNSL, most often composed of centroblasts and less frequently of
immunoblasts, infiltrate the neural parenchyma with diffuse, invasive, or perivascular growth patterns.
