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Degree of CD28 expression on CD4+ T-lymphocytes in comparison with CD3-ζ expression in secondary follicles (germinal centers). The table comprises 15 cases, where both analyses could be done in the same sentinel node biopsies (numbers are frequencies).
| Expression of CD3-ζ | Expression of CD28 on CD4+ | ||
| High | Moderate | Low | |
| High | 0 | 1 | 1 |
| Moderate | 0 | 1 | 1 |
| Low | 0 | 1 | 10 |
