Fr3-JH PCR analysis of KSHV-positive plasmablasts in MCD, microlymphoma, and frank plasmablastic lymphoma.

Whole sections of MCD-involved spleen show polyclonal patterns; microdissected microlymphomas display polyclonal (C2) or monoclonal (C1) patterns; frank plasmablastic lymphomas show monoclonal patterns. C1, C2, and C5 indicate different cases; P, positive control; N, negative control; ML, microlymphoma.