CD19 by Immunohistochemistry
Also known as: CD19 IHC
Use
Immunohistochemistry (IHC) stain of CD19, a B‑cell lineage marker expressed on normal and neoplastic B cells (and follicular dendritic cells), used to confirm B‑cell lineage in pathological specimens. It is applied as a technical (stain-and-return) service without pathologist interpretation, serving as an ancillary diagnostic tool in evaluating hematolymphoid neoplasms.
Special Instructions
Submit via electronic request or using ARUP Immunohistochemistry Stain Form (#32978) if electronic capability is unavailable. Use ARUP Connect™ or contact ARUP Client Services. Formalin-fixed, paraffin‑embedded tissue or cell‑block required; protect from heat. Send tissue block or at least 5 unstained (3–5 µm), positively charged slides in ARUP transport kit #47808. For precut slides, do not oven bake.
Limitations
Only provided as a technical stain service; interpretation not included. Unsuitable for non-representative or depleted specimens. Frozen specimens unacceptable. Slides must be positively charged and handled to preserve immunoreactivity. Does not include pathologist interpretation; ordering of separate pathology consultation required for diagnostic interpretation.
New York Approved
Methodology
Immunoassay (IHC)
Biomarkers
LOINC Codes
- 94736-6
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Tissue (FFPE)
Volume
Not provided
Minimum Volume
Not provided
Container
ARUP tissue transport kit #47808
Collection Instructions
Protect paraffin block and/or slides from excessive heat; do not oven bake precut slides.
Storage Instructions
Room temperature or refrigerated; ship in cooled container during summer months.
Causes for Rejection
Non‑representative tissue type; depleted specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Indefinitely |
| Refrigerated | Indefinitely |
| Frozen | Unacceptable |