A cell surface glycoprotein that is first expressed by cells of the B-cell lineage and follicular dendritic cells, and continues to be expressed at variable levels through terminal B-lymphoid differentiation in plasma cells. The majority of mature and immature B-lymphoid neoplasms express CD19 and it may be useful in providing diagnostic information for the study of B-lymphoproliferative disorders.
A formalin-fixed, paraffin-embedded (FFPE) tissue block is preferred specimen typeorOne (1) unbaked, unstained slide for H&E staining (required) and two to three (2-3) positively charged unstained slides (all cut at 4-5 microns) for each test/antibody orderedBlock and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.
Use cold pack for transport. Make sure cold pack is not in direct contact with specimen.