Acute abdomen during pregnancy: appendicular deciduosis-a case report.

Despite the fact that it is rarely found in the appendix during pregnancy, ectopic decidua can, in some cases, cause the occlusion of the appendicular lumen by extrinsic compression due to the expansion of endometrial tissue or due to decidua polyp formation. This condition consequently leads to appendicular inflammation. We report the case of a 27-year-old primigravida woman, 32 weeks of gestation, who presented to our facility with a 2-day history of isolated right iliac fossa pain. The diagnosis of an acute appendicitis was suspected and a planned appendectomy was performed. Microscopical examination showed appendicular deciduosis.