Fig 5. Cell block and immunohistochemistry of late onset breast peri-implant seromas.

A. Acute-type reactive effusion with numerous polymorphonucleates admixed with CD68⁺ macrophages and scattered CD3⁺ T-cells. B. Chronic-type reactive effusion with predominance of foamy macrophages C. Chronic-type reactive effusion with predominance of T cells. In all the reactive effusions CD30⁺ cells were very rare or absent. Scant PAX5⁺ B-cells were detected in all types of seroma (H&E and immunohistochemistry original magnification x400).