Prenatal ultrasonographic diagnosis of Fetus in Fetu at 2nd trimester: A case report.

Shim, In Suk; Lee, Sun Ah; Park, Mi Hye; Park, Eun Ae; Kim, Young Ju; Choe, Gum Ja; Ahn, Jung Ja; Kim, Jong Il; Chun, Sun Hee

Case Report

Korean Journal of Obstetrics & Gynecology 2007;50(4):673-677.
Published online April 1, 2007.

Prenatal ultrasonographic diagnosis of Fetus in Fetu at 2nd trimester: A case report.

In Suk Shim, Sun Ah Lee, Mi Hye Park, Eun Ae Park, Young Ju Kim, Gum Ja Choe, Jung Ja Ahn, Jong Il Kim, Sun Hee Chun

¹Department of Obstetrics and Gynecology, College of Medicine, Ewha Womans University, Seoul, Korea. ewhapmh@ewha.ac.kr
²Department of Pathology, College of Medicine, Ewha Womans University, Seoul, Korea.
³Department of Pediatrics, College of Medicine, Ewha Womans University, Seoul, Korea.
⁴Department of Surgery, College of Medicine, Ewha Womans University, Seoul, Korea.

Abstract

Fetus in fetu is an very rare condition in which a vertebrate fetus is incorporated within its twin. Although a number of cases were reported at 3rd trimester of gestation or postnatally, the authors present a retroperitoneal fetus in fetu with 9 x 7 x 6 cm sized cystic mass that was diagnosed at 2nd trimester using ultrasonography and confirmed on a computed tomography scan after birth. The mass was successfully excised postnatally and consistent with a fetus in fetu by pathological confirmation. Solid mass was surrounded by a fluid-containing sac and showed highly ordered organogenesis around an axial vertebral column.

Key Words: 2nd trimester, Fetus in fetu, Ultrasonographic diagnosis