P17.01: Ultrasound differential diagnosis of toraco‐abdominal fetal cystic masses

Abstract

Establish the differential diagnosis of fetal toraco-abdominal cystic masses in ultrasound in our experience. Retrospective analysis of fetal toraco-abdominal hipoecogenic masses diagnosed in prenatal ultrasound imaging for the last three years (January 2016-December 2018) in a terciary centre. Ultrasound pathological images were stored and reviewed by two expert sonographers. Out of 5451 fetus analysed, there were 86 cases of fetal toraco-abdominal hipoecogenic toraco-abdominal masses at gestational ages ranging from 12-37 weeks of gestation. Differential diagnosis included 39 cases of kidney pathology, 7 cases of cysts of other abdominal locations (mesenteric, liver, ovarian, suprarrenal), 9 abdominal umbilical cord alterations, 6 intestinal obstructions, 8 disruptions of abdominal wall, 6 cases of ascitis, 10 thorax patology, 1 sacroccocigeal teratoma (table1). The most important ítems to differentiate a suspicious hipoecogenic mass are the localisation, its ultrasound characteristics, its relationship with other structures and to rule out different pathology. Special attention must be paid to renal disruptions. P17.01: Table 1. Differential diagnosis of toraco-abdominal fetal cystic masses Mesenteric cyst (N: 3) Liver cyst (N: 4) Ovarian cyst (N: 3) Suprarrenal cyst (N: 1) Aneurismatic dilation of UC (N: 4) Persistence of right umbilical vein (N: 5) Omphalocele (N: 4) Gastroschisis (N: 3) Umbilical hernia (N: 1) Ascitis with associated anomalies (N: 6) Sacroccocigeal teratoma (N: 1) Intestinal dilation (N: 5) Anular páncreas (N: 1) Renal dilation (N: 10) Pelvic kidney (N: 9) Polycystic kidney (N: 6) Megaurether (N: 6) Renal cyst (N: 4) Renal displasia (N: 3) Posterior urethral valves (N: 1) Congenital malformation of the pulmonary airway (N: 7) Broncogenic cyst (N: 1) Pleural effusion (N: 2) Supporting information can be found in the online version of this abstract Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.