37 degrees CE rosettes in various malignant and non-malignant disorders

Area of Science:

• Immunology
• Hematology
• Pathology

Background:

• T lymphocytes are crucial immune cells with specific surface markers.
• Sheep erythrocyte rosettes (SERs) at 37°C are a characteristic of certain T lymphocyte populations.
• Previous studies identified these rosette-forming T cells in thymus, stimulated cultures, and certain leukemias.

Purpose of the Study:

• To investigate the presence and significance of T lymphocytes forming sheep erythrocyte rosettes (37°C) in various lymph node disorders.
• To determine if these T lymphocytes are found in tonsils and reactive lymph nodes.
• To discuss the implications for interpreting immune red cell rosettes and T lymphocyte subclasses.

Main Methods:

• Histopathological examination of lymph node and tonsil biopsies.
• Identification of T lymphocytes forming sheep erythrocyte rosettes at 37°C.
• Analysis of lymphocyte populations in various pathological conditions.

Main Results:

• T lymphocytes forming sheep erythrocyte rosettes were found in lymph nodes affected by Hodgkin's disease, Lennert's lymphoma, malignant lymphoma, immunoblastic lymphadenopathy, and metastatic carcinoma.
• A significant number of these T lymphocytes were present in tonsils.
• Reactive lymph nodes did not show a significant number of these rosette-forming T lymphocytes.

Conclusions:

• The presence of T lymphocytes forming sheep erythrocyte rosettes is indicative of specific T cell populations in various lymph node pathologies and tonsils.
• These findings necessitate careful interpretation of immune red cell rosettes in diagnostic pathology.
• Further research into T lymphocyte subclasses associated with rosette formation is warranted.