Simultaneous rupturing heterotopic pregnancy and acute appendicitis in an in-vitro fertilization twin pregnancy.

The presentation of acute abdominal pain in young women is not an unusual occurrence in casualty and gynaecology departments. Both acute appendicitis and ectopic pregnancy have to be considered and investigated, as these two conditions are accepted as the most common surgical causes of an acute abdomen. Difficulties in correctly identifying the cause of the pain can be hazardous to the patient and care needs to be taken in obtaining a prompt and accurate diagnosis enabling the most appropriate management. The case report presented here describes the extremely unusual occurrence of both these acute conditions happening simultaneously with the added complication of an ongoing twin pregnancy and it highlights the need to look beyond the most obvious diagnosis and always to expect the unexpected.