Anaplastic Lymphoma Kinase-Positive Large B-Cell Lymphoma: An Underrecognized Aggressive Lymphoma
Figure 2
ALK+ LBCL immunohistochemical profile. All tumors are positive for ALK (a) and CD138 (b). CD20 (c) is almost always negative, but MUM-1 (d) is frequently positive. IgA is often expressed (e). EMA can show focal to diffuse positivity (f). All microphotographs are 400x.