Diffuse peritoneal deciduosis in pregnancy.

Ectopic decidua is a rare benign condition, believed to be associated with excessive progesterone stimulation such as in multiple gestations as in our case, it's usually asymptomatic and found incidentally during caesarean section. The lesions involute spontaneously in the postpartum period; therefore it usually doesn't require any therapeutic interventions. This condition could induce anxiety to surgeons intra-operatively, because of resemblance of more sinister lesions such as: carcinomatosis and granulomas. We report a clinical case of diffuse peritoneal deciduosis, identified during an emergency caesarean section, performed at 33 weeks of gestation, for a transverse lie, twins DCDA pregnancy in active labor.