T cell-restricted intracellular antigen by IHC-12376 - Technical only, 12379 - Technical & interpretation

Test info

T cell-restricted intracellular antigen by IHC
12376 - Technical only, 12379 - Technical & interpretation
  • All IHC stains will include a positive control tissue
  • TIA-1 is used (often in a panel with Granzyme B) to identify cytotoxic (NK-like) T-cell lymphomas, especially enteropathy associated T-cell lymphomas, and subcutaneous panniculitis-like T-cell lymphoma. These antibodies also identify true NK cell lymphomas/leukemias, including aggressive NK-cell leukemia/lymphoma and extra-nodal NK/T-cell lymphoma, nasal type
  • NK cell lymphomas are usually aggressive, and are associated with rapid progression, treatment failures, and relapses; therefore, accurate diagnosis is essential
  • Some studies report an associated of nasal-type NK cell lymphomas with EBV, and are more common in Asian and Latin American countries
  • P53 is also expressed in a high percentage of these types of lymphomas
  • TIA-1 should be used in a panel with other T cell markers, as well as with CD56 and Granzyme B (or perforin)



Submit a formalin-fixed, paraffin embedded tissue block


Formalin-fixed, paraffin embedded (FFPE) tissue block


FFPE tissue section mounted on a charged, unstained slide


Ambient (preferred)

  • Unlabeled/mislabeled block
  • Insufficient tissue
  • Slides broken beyond repair


AHL - Immunohistochemistry
Mo - Fr
1 - 2 days

Immunohistochemical staining and microscopic examination

Clinical and Interpretive info


If requested, an interpretive report will be provided



  • TIA-1 is a granule-associated cytotoxic protein, found in cytotoxic T lymphocytes (CTL) and in natural killer (NK) cells
  • TIA-1 is expressed by NK cell lymphomas and by some T-cell lymphomas
  • TIA-1 expression is evidence of an activated state of CTL and NK cells, and is therefore useful in identifying related lymphomas associated with these types of cells

 Staining pattern

  • Granular cytoplasmic staining


  1. Gall K et al: Sinonasal NK/T-cell lymphomas in the United States. Am J Surg Pathol 24(11):1511-1517, 2000.
  2. Natkunam Y et al: Aggressive cutaneous NK and NK-like T-cell lymphomas; clinicopathologic, immunohistochemical and molecular analyses of 12 cases. Am J Surg Pathol 23(5): 571-581, 1999.
  3. Quintanilla-Martinez L et al: Histological and Immunophenotypic profile of nasal NK/T cell lymphomas from Peru: high prevalence of p53 over-expression. Hum Pathol 30:849-855, 1999.
  4. Kumar S et al: Subcutaneous panniculitic T-cell lymphoma is a tumor of cytotoxic T lymphocytes. Hum Pathol 29:397-403, 1998.


88342 - 1st stain
88341 - each additional stain