%0 Case Reports %T Deciduosis of the appendix: a rare cause of acute abdomen during pregnancy (a case report). %A Smits L %A Bockstal MV %A Frezin J %J Pan Afr Med J %V 37 %N 0 %D 2020 %M 33654535 暂无%R 10.11604/pamj.2020.37.316.26728 %X Appendectomy is the most common non-obstetric surgical intervention in pregnant patients. In rare cases, deciduosis can develop during pregnancy in the appendix and cause inflammation through appendiceal occlusion by ectopic decidua tissue. We report a 28-year-old woman at 32 weeks of pregnancy, who presented at the emergency room with the diagnosis of an acute appendicitis. After successful appendectomy and histopathological examination of the appendectomy specimen, a diagnosis of appendiceal deciduosis with acute appendicitis was established. Here, we discuss the origin of appendiceal deciduosis, as well as its clinical and histopathological presentation.