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Differentiating Benign From Malignant Bone Marrow B-Cell Lymphoid Aggregates: A Statistical Analysis of Distinguishing Features
Abstract
Context
Lymphoid aggregates are seen in a minority of bone marrow biopsy specimens, and when present, their neoplastic nature is often apparent by morphologic evaluation. However, the distinction between benign and malignant aggregates can be a diagnostic challenge when there are multiple aggregates with no documented history of lymphoma.Objective
To aid in the distinction between benign and malignant B-cell lymphoid aggregates.Design
Previously, we described specific distribution patterns for B and T lymphocytes within bone marrow aggregates. To statistically analyze the significance of these patterns as well as previously reported criteria, we examined 128 bone marrow specimens with benign aggregates and 78 specimens with documented malignant B-cell aggregates and calculated specific odds ratios (ORs) and 95% confidence intervals (CIs) to aid in differentiating between benign and malignant B-cell aggregates.Results
Aggregates with infiltrative edges (OR, 80.54; 95% CI, 31.76-204.21), a B-cell pattern (OR, 30.08; 95% CI, 13.28-68.10), paratrabecular location (OR, 10.17; 95% CI, 3.96-26.12), size greater than 600 μm (OR, 6.83: 95% CI, 3.61-12.93), or cytologic atypia correlated with malignancy.Conclusions
When taken collectively, the presence of more than 2 of these characteristic features was strongly predictive of malignancy.Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.
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