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Reactivity of 5B14 mAb in small round blue cell tumours. Lymphoblastic lymphomas (A) and blastematous components of Wilms’ tumours (B) were always negative. Three out of 11 Burkitt's lymphoma specimens showed focal positivity (C) Several rhabdomyosarcomas (D), as well as medulloblastomas (not shown) and neuroblastomas (NB) (see Figure 2), were positive. *Area corresponding to the inset. Original magnification ×100, insets ×400.
