Accessory spleen.

An accessory spleen (AS), or splenunculus, is a small nodule of splenic tissue found outside of the spleen. Post-mortem examinations, also known as autopsies, are carried out to identify a cause of death, and to assess the state of the organs of the deceased. We present two incidental cases of splenunculi, one localized in greater omentum and a second one localized in the hilum of the spleen, diagnosed during a histopathological examination. An immunohistochemical profile of the normal and accessory spleen was followed where the expression of the CD20, CD3, CD23, α-SMA were analyzed.