Cytogenetic abnormalities in benign lymphoid hyperplasia: a dual-parameter study using chromosome analysis and flow...

Area of Science:

• Hematology
• Cytogenetics
• Immunology

Background:

• Benign reactive hyperplasia in lymphoid tissues can present with chromosomal abnormalities.
• Early detection of such abnormalities is critical, even in clinically well patients.

Purpose of the Study:

• To investigate the presence and nature of chromosomal abnormalities in benign reactive lymphoid hyperplasia.
• To evaluate the utility of cytogenetic analysis and flow cytometry (FCM) in identifying these abnormalities.

Main Methods:

• Prospective study of 20 lymphoid tissue samples (18 lymph nodes, 2 tonsils).
• Cytogenetic analysis of mitogen-stimulated cells.
• DNA content measurement using flow cytometry (FCM).
• Surface membrane immunoglobulin studies.

Main Results:

• Clonal chromosome abnormalities were detected in 9 of 20 samples.
• Abnormal DNA content by FCM was found in 10 of 20 samples.
• Monoclonal surface immunoglobulin was detected in 5 of 15 samples.
• No direct correlation found between immunoglobulin studies and cytogenetic/FCM analyses.

Conclusions:

• Aneuploidy is a common finding in reactive lymphoid tissue.
• Integrated use of cytogenetics and FCM is necessary for comprehensive identification of abnormalities.
• The study highlights the complexity of chromosomal changes in non-malignant lymphoid proliferation.