Fig. 10 Posterior placenta increta. a H&E stained section at 9100
original magnification from area with normal implantation. There is
an intact decidual layer indicated by brackets. Only rare scattered
extravillous trophoblast cells are seen in the myometrium (arrow).
b An area of placental invasion shows loss of the decidual layer. c A
pan-cytokeratin stain shows extensive infiltration of the myometrium
by trophoblast. This pattern is not focused on vessels as in normal
implantation