Terminal deoxynucleotidyl transferase activity in lymphoma

Area of Science:

• Oncology
• Immunology
• Pathology

Background:

• Lymphomas are cancers of the lymphatic system, broadly classified into T-cell and B-cell types.
• Accurate subtyping of lymphoma is crucial for effective treatment and prognosis.
• Terminal deoxynucleotidyl transferase (TdT) is an enzyme found in certain lymphocytes.

Purpose of the Study:

• To evaluate the utility of TdT estimation in differentiating T-cell lymphomas from other lymphoma types.
• To correlate TdT expression with histological subtypes and surface marker profiles in lymphoma patients.

Main Methods:

• Tissue samples from 42 lymphoma patients were analyzed for TdT expression.
• Lymphoma cell types were determined using surface marker analysis.
• Histological examination of lymph node tissues was performed.

Main Results:

• Four out of 8 T-cell lymphoma patients tested positive for TdT (TdT+).
• TdT-negative (TdT-) T-cell lymphomas exhibited various histological patterns.
• All 31 B-cell lymphoma patients and Hodgkin's lymphoma tissues were TdT-negative.

Conclusions:

• TdT estimation in lymphoma tissues may serve as a valuable diagnostic marker for T-cell lymphoma.
• This test is particularly useful for lymphomas with undifferentiated or poorly differentiated histology.
• TdT negativity strongly suggests B-cell or Hodgkin's lymphoma, aiding in differential diagnosis.