Fever of Unknown Origin: An Unusual Presentation of Kikuchi-Fujimoto Disease

Figure 1

Photomicrophotograph of lymph node biopsy shows paracortical necrosis, histiocytes, apoptotic bodies, and nuclear dust (karyorrhexis). CD3 and CD20 immunostains demonstrate the reactive population of lymphoid cells including both B cells (CD20 immunopositive) and T cells (CD3 immunopositive).