File:Placenta previa and increta 01.jpg

• A - Cut surface of the uterus with attached placenta and umbilical cord. The left end of the uterus is the uterine cervix (arrow), and the right end of uterus is the uterine fundus. The cut surface shows abnormal placental adherence in the low uterine segment (placenta previa). The placenta invades into the myometrium, but does not penetrate through it (placenta increta).
• B - The placenta invades the myometrium without intervening decidua. It is partially separated from focally hyalinized myometrial smooth muscle cells by a layer of fibrin. Partial or complete absence of decidua basalis, which may be replaced by loose connective tissue, is the cardinal feature in microscopic examination (H&E stain, ×100).

Reference

<pubmed>20358016</pubmed>| PMC2844598 | J Korean Med Sci.

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Fig. 3 Jkms-25-651-g003-l.jpg http://synapse.koreamed.org/ViewImage.php?Type=F&aid=263059&id=F3&afn=63_JKMS_25_4_651&fn=jkms-25-651-g003_0063JKMS