title: Misdiagnosis of fetus-in-fetu as meconium peritonitis.
abstract: Fetus-in-fetu (FIF) is a rare congenital condition in which a fetiform mass is detected in the host abdomen and also in other sites such as the intracranium, thorax, head, and neck. This condition has been rarely reported in the literature. Herein, we report the case of a fetus presenting with abdominal cystic mass and ascites and prenatally diagnosed as meconium pseudocyst. Explorative laparotomy revealed an irregular fetiform mass in the retroperitoneum within a fluid-filled cyst. The mass contained intestinal tract, liver, pancreas, and finger. Fetal abdominal cystic mass has been identified in a broad spectrum of diseases. However, as in our case, FIF is often overlooked during differential diagnosis. FIF should also be differentiated from other conditions associated with fetal abdominal masses.
authors: Department of Pediatrics, Seoul National University College of Medicine, Seoul, Korea.
authors: Yoon Joo
authors: YJ
authors: Kim
authors: Se Hyung
authors: SH
authors: Sohn
authors: Ju Young
authors: JY
authors: Lee
authors: Jin A
authors: JA
authors: Sohn
authors: Eun Hee
authors: EH
authors: Lee
authors: Ee Kyung
authors: EK
authors: Kim
authors: Chang Won
authors: CW
authors: Choi
authors: Han Suk
authors: HS
authors: Kim
authors: Beyong Il
authors: BI
authors: Kim
authors: Jung Hwan
authors: JH
authors: Choi