Relapsed Acute Lymphoblastic Leukemia Presenting as Acute Renal Failure

Figure 2

Fine needle aspiration of the kidney. Top left: H&E stain shows blue tumor cells infiltrating the kidney, pushing the tubules and glomeruli apart. Top right: CD20 marker positivity, which is associated with B-cells. Bottom left: CD79 marker positivity, which is associated with B-cells. Bottom right: Terminal deoxynucleotidyl transferase (TdT) positivity, often seen in acute lymphoblastic leukemia.