Complex sentence: The presence of HHV8 is associated with plasmablasts that express IgM-immunoglobulin light chains, most often of lambda subtype, within the mantle zone of B-cell follicles; these cells can progress to microlymphoma (microscopic clusters of plasmablast cells) or clinical lymphoma.
Split into simpler sentences: The presence of HHV8 is associated with plasmablasts within the mantle zone of B-cell follicles. These cells can progress to microlymphoma (microscopic clusters of plasmablast cells) or clinical lymphoma.