CD19 and tuberculosis: The findings from the Immunohistochemistry (IHC) analysis are summarized as follows: CD3 partially (+), CD5 partially (+), PAX5 partially (+), CD20 partially (+), CD19 partially (+), MUM1 plasma cells (+), CD138 plasma cells (+), Bcl-2 partially (+), CD68 histiocytes (+), CD21 a few FDC nets, Ki-67 (15%+), tuberculosis PCR (-), acid-fast (-), silver staining (-), mucicarmine (-), PAS (+), TB fluorescence (-), fungal immunofluorescence (-), CMV2 (a small amount +), and EBER (-).