TIA-1

Alias/Synonym: Anaplastic Large Cell Lymphomas, T-cell Restricted Intracellular Antigen

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:

TIA-1 antibody (T-cell intracellular antigen-1) is expressed in lymphocytes processing cytolytic potential. Perforin produced by these cells punctures a hold in the membrane of the target cells. TIA-1 and granzyme enter through the hold and active apoptotic proteins. Studies show that 60 to 70% of anaplastic large cell lymphoma reacts with TIA-1. Studies also indicate that TIA-1 reacts with most large granular lymphocytic leukemias, hepatosplenic T-cell lymphomas, intestinal T-cell lymphomas, NK-like T-cell lymphomas, NK cell lymphomas, nasal T/NK-cell lymphomas, subcutaneous T-cell lymphomas and pulmonary angiocentric lymphomas of T-or NK-phenotype. B-cell lymphomas, Hodgkin’s and lymphoblastic leukemias are usually negative for TIA-1.

Limitations:

Turnaround Time:

1 day(s)

Reference Ranges:

N/A

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