Macroscopic Deciduosis in Pregnancy is Finally a Common Entity

Ectopic decidua or deciduosis is defined as the extrauterine location of decidual tissue and can occur in the cervix, vagina and various abdominal organs like the ovary omentum, appendix, peritoneum, the pelvic lymph nodes. Other rare sites with deciduosis include the kidneys , the lungs and even the skin . Decidualization is a physiologic process during pregnancy, under the influence of ovarian and placental steroid secretion, with total involution in the four to six week post partum period.