Placenta Creta: A Spectrum of Lesions Associated with Shallow Placental Implantation

Figure 1

Placenta creta spectrum (haematoxylin and eosin, original objective magnifications are given in parentheses). (a) Placenta increta: myometrial fibers are intermingled with chorionic villi (20x). (b) Placenta percreta: placental tissue is separated from the subperitoneal fat only by fibrous tissue (10x). (c) Symptomatic placenta accreta: myometrial tissue in direct contact with the intervillous space (10x). (d) Occult placenta accreta: extravillous trophoblasts with underlying myometrial fibers in direct contact with the intervillous space (10x). (e) Occult placenta accreta: Rohr fibrinoid with an underlying mix of myometrial fibers and extravillous trophoblast (10x). (f) Basal plate myometrial fibers: Rohr fibrinoid with underlying decidua, Nitabush fibrinoid, and myometrial fibers (40x). (g) Myometrial fibers in a shaved section from a margin of disruption of the maternal floor (20x). (h) Placental membranes with adjacent myometrial fibers (chorion leave accreta) (10x).