Fig. 3

a. Fragment of the endometrial mucosa showing proliferative endometrial glands with an edematous stroma. It is difficult to identify plasma cells in HE staining. Most inflammatory cells are lymphocytes (HE 100X). b. Fragment of the endometrial mucosa that shows a positive reaction to CD138 by the IHC (immunohistochemical) technique. Positive control is represented by glandular epithelial cells. In the stroma there are cells with a positive expression (100x). c. The image shows the expression of the positive control (glands) for the CD138 reaction and in the stroma there are several cells with surface marker expression, with equal epithelial intensity of CD138 (plasma cells). Most stromal cells are negative. 200X