Placental gross/microscopic abnormalities, non-neoplastic
Reviewers: Mandolin Ziadie, M.D. (see Reviewers page)
Revised: 16 November 2011, last major update October 2011
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● Placental polyps are intrauterine polyps due to retention of placental tissue, reported after induced abortions (Hum Pathol 1988;19:1467) and term pregnancies
● Amniotic polyps have been reported in triploid pregnancies (Am J Obstetr Gynecol 1966;96:357) and in those from infants with neonatal epidermolysis bullosa (Am J Obstet Gynecol 1988;158:150)
● Uterine placental polyps are composed of necrotic and hyalinized chorionic villi without identifiable lining trophoblast; intermediate trophoblast is usually viable; base of polyp is composed of decidua with dilated blood vessels
● Amniotic polyps are composed of thin connective tissue stalks lined by amniotic degenerating epithelium
End of Placenta > Placental gross/microscopic abnormalities, non-neoplastic > Polyps
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