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Leu-M1 antigen expression in T-cell neoplasia
The American Journal of Pathology
|December 1, 1985
Summary
The Leu-M1 antigen is not a specific marker for Hodgkin's disease. This study found Leu-M1 expressed in half of T-cell neoplasms, limiting its diagnostic value.
Area of Science:
- Immunology
- Oncology
- Pathology
Background:
- The Leu-M1 antigen was proposed as a marker for Hodgkin's disease (HD) and Reed-Sternberg cells.
- It was suggested to aid in distinguishing HD from T-cell lymphomas.
Purpose of the Study:
- To evaluate the expression of the Leu-M1 antigen in various T-cell neoplasms.
- To determine the diagnostic utility of Leu-M1 in differentiating HD from T-cell malignancies.
Main Methods:
- Analysis of paraffin-embedded tissue sections from 38 patients with T-cell neoplasms.
- Immunohistochemical staining for the Leu-M1 antigen.
- Categorization of cases into lymphoblastic lymphoma/leukemias, mature T-cell leukemias, peripheral T-cell lymphomas, and cutaneous T-cell lymphomas.
Main Results:
- The Leu-M1 antigen was expressed in 19 out of 38 (50%) of the T-cell neoplasms studied.
- Expression patterns varied but correlated with mature, postthymic T-cell differentiation and activation.
- Pleomorphic neoplastic T cells, including Reed-Sternberg-like cells, showed intense staining, mimicking HD.
Conclusions:
- Leu-M1 is not a specific immunodiagnostic marker for Hodgkin's disease.
- Its utility in distinguishing HD from morphologically similar T-cell neoplasms is limited.