Figure 3
Representative low to medium power views of hematoxylin and eosin stained sections of a testicular polyembryoma (Case 2). The embryoid bodies are evenly distributed in a multinodular pattern with scattered variably sized cysts, which are sometimes filled with hemorrhage (a, b). The aggregates of embryoid bodies are embedded in a loose edematous myxoid stroma, which together form lobules that are accentuated by the surrounding fibrous background (a–c). Several embryoid bodies, especially those seen on higher power (c,d), contain crescentic to cystic spaces which recapitulate the amniotic cavity and yolk-sac vesicle. The amniotic cavity (AC) and yolk-sac cavity (YSC) of one embryoid body are highlighted in c.
