CD123

Alias/Synonym: Interleukin-3 Receptor

CPT Code: 88342

Includes:

Specimen Type, Preferred:

Formalin fixed paraffin embedded tissue

Specimen Type, Alternate:

Sample Quantity, Preferred:

1 block

2 slides

Sample Quantity, Minimum:

N/A

Transport Container:

Paraffin block

Unstained slides

Transport Temperature:

Room temperature

Collection Instructions:

Block and slide identifiers should be clearly written and match exactly with the specimen ID and specimen labeling as noted on the requisition.

Slides should be positively charged and cut at 3-4 microns for each stain/antibody ordered.

Specimen Stability:

N/A

Rejection Criteria:

No liquid specimens.

Uncharged slides

Clinical Significance:

The CD123 antigen is also known as the alpha subunit of the human interleukin-3 receptor. It is a type I transmembrane glycoprotein and is a member of the cytokine receptor superfamily. CD123 forms a heterodimer with CD131 (the beta subunit of the interleukin-3 receptor) to form the interleukin-3 receptor, where the cytokine specificity is provided by the alpha subunit and the signal transduction function is provided by the beta subunit. The interleukin-3 receptor is reported to be expressed on monocytes, neutrophils, basophils, eosinophils, megakaryocytes, proliferation and differentiation of these cells. It is identified on the CD4+/CD56+ lineage neoplasm (blastic NK-cell lymphoma). Outside the hematopoietic system CD123 is reported to be expressed in Leydig cells of the testis, some endothelial cells, and cells of the placenta and brain.

Limitations:

Turnaround Time:

1 day(s)

Reference Ranges:

N/A

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