Styliani Archontaki MD, Presenter: Nothing to Disclose

Yvan Vial MD, Abstract Co-Author: Nothing to Disclose

Reto Antoine Meuli MD, PhD, Abstract Co-Author: Nothing to Disclose

Leonor Alamo MD, Abstract Co-Author: Nothing to Disclose

The differential diagnosis of a cystic imaging in a fetal pelvis includes firstly true cystic lesions lesions, including also congenital cysts or tumor lesions and secondly, anomalous accumulation of liquid in a pelvic hollow organ, creating a “pseudocyst”. The differential diagnosis changes according not only to the characteristics of the lesions, but also to the fetal sex and the pelvic anatomic space in which the cyst is located. The purpose of this pictorial essay is to develop a practical approach to the interpretation of pelvic cystic masses observed in utero, with emphasis on prenatal MRI studies, based on demonstrative proven cases detected and followed-up in our Institution.

1.Cysts in the fetal pelvis: differential diagnosis and classification (Table 1). 2.Prenatal imaging studies of the fetal pelvis. - Limits of US. - Indications for additional MRI. Protocols. - Normal anatomy of the fetal pelvis in MRI. Division in spaces for males and females (fig. 2-3). - Differential diagnosis in each pelvic space for males and females (fig. 2-3). 3. Demonstrative cases of a wide spectrum of fetal cystic lesions diagnosed in our institution, with prenatal US and MRI images and final diagnosis, obtained from autopsies, pathologic exams and/or postnatal imaging studies. (Examples; fig. 4-5)  

http://abstract.rsna.org/uploads/2014/14013736/14013736_csfh.pdf

Archontaki, S, Vial, Y, Meuli, R, Alamo, L, Cystic Masses and Pseudomasses in the Fetal Pelvis: A Differential Diagnosis Based on Fetal MRI and US Findings.  Radiological Society of North America 2014 Scientific Assembly and Annual Meeting, - ,Chicago IL. http://archive.rsna.org/2014/14013736.html