An Adult Patient with Systemic Mastocytosis and B-Acute Lymphoblastic Leukemia

Figure 3

Final bone marrow trephine biopsy in which there is extensive infiltration by medium sized lymphoblasts (a), which were immunohistochemically positive for TDT (b). Concurrent mast cell infiltration is also observed (c-KIT immunohistochemical analysis (c)).

(a)

(b)

(c)