Fetus in Fetu: A Rare Presentation in an Adult Female

A case of fetus in fetu, a pathologic condition resulting from abnormal embryogenesis in a diamniotic, monochrionic pregnancy is reported. This condition usually presents in infancy and childhood. In this present case, a 30 year old patient misdiagnosed preoperatively as retroperitoneal dermoid is presented. This is the oldest patient reported with fetus in fetu in literature.

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