Differential diagnoses of right lower quadrant pain in late pregnancy.

We present two patients with right lower quadrant pain during the 36th week of pregnancy. In both cases, the challenges in diagnosing acute appendicitis in late pregnancy is underlined by misleading imaging results, revealing fluid in the lower abdomen, suggesting an appendicitis. Surgery was performed. Pre- and intraoperative gynecological examinations showed no signs of fetal distress. In patient 1, surgery revealed a torsion and necrosis of the right ovary and a 7-cm cyst of the fallopian tube. Open ovariectomy and appendectomy were performed. In patient 2, we saw a perforated appendicitis and cloudy ascites. Histology after appendectomy showed spots of endometriosis and serositis infiltrating into the appendix with signs of perforation at the tip. Patient 1 recovered after a short period of bowel paralysis. Patient 2 needed Caesarean section due to severe deceleration in the cardiotocograph and irregular uterine contractions. The newborn was kept in the neonatal ICU for 10 days.

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