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Expression of B-cells markers in tumor cell surfaces (CD20, CD79a, CD10, CD19) in the CD20 negative patients with relapsed or refractory follicular lymphoma at resample time on fresh tumor biopsy. All tests were performed by immunohistochemistry
| CD20 | CD79a | CD10 | CD19 | |
| Pt #15 | - | + | + | NA* |
| Pt #22 | - | + | + | + |
| Pt #24 | - | + | + | + |
| Pt #26 | - | NA* | + | NA* |
| Pt #28 | - | + | + | + |
*The tumor material was sold out and not sufficient to perform these analyses. NA: Not available.
