Figure 3. SMARCB1 (INI1) immunostaining in SMARCB1-deficient dedifferentiated endometrial carcinomas.
A-B) case 1 showing FIGO grade 1 endometrioid component and undifferentiated component in A with a higher magnification of the undifferentiated component in B. C-D) case 1 showing a complete loss of SMARCB1 nuclear staining in the undifferentiated component (with internal stromal positive control) and intact SMARCB1 nuclear staining in the differentiated endometrioid component. E-F) case 8 showing SMARCB1-deficient undifferentiated component.