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Washington University Experience | NEOPLASMS (HEMATOLYMPHOID) | Lymphoma, secondary | 1D2 Lymphoma, anaplastic large T cell, secondary (Case 1) CD30 3.jpg
1C3,4 The large tumor cells are also strongly positive for Alk1 (1C4) but negative for CD20 (not shown) which corresponded to the tumor in the patient's prior lymph node biopsy diagnosed as anaplastic large cell lymphoma.
