Incidence, prognosis, and perinatal outcomes of and risk factors for severe twin–twin transfusion syndrome with right ventricular outflow tract obstruction in the recipient twin after fetoscopic laser photocoagulation

Table 2 Characteristics of the patients with severe twin-to-twin transfusion syndrome with and without recipient right ventricular obstruction (RVOTO) post fetoscopic laser therapy with recipient survival

	Recipient twin with RVOTO (N=11)	Recipient twin without RVOTO (n=130)	p
Mean birth weight of donor (g)	1685 ± 591	1500 ± 696	0.39^#
Mean birth weight of recipient (g)	2053 ± 646	1786 ± 646	0.14^#
Mild brain image anomaly of donor	1/11 (9.1%)	3/130 (2.3%)	0.28*
Mild brain image anomaly of recipient	0/11	4/130 (3.1%)	1.0*
Severe brain image anomaly of donor	0/11	2 /130 (1.5%)	1.0*
Severe brain image anomaly of recipient	0/11	0/130	1.0*

Mild cerebral image anomaly: defined by lesions detected in cranial ultrasound scans with the presence of at least one of the following: intraventricular hemorrhage (IVH) grade I and II, lenticulostriate vasculopathy, and subependymal pseudocysts.
Severe cerebral image anomaly: defined by the presentation of one of the following signs: IVH grade III or grade IV, cystic periventricular leukomalacia grade II or more, porencephalic cysts, and ventricular dilatation. Ventricular dilatation was diagnosed when the width of the unilateral or of both lateral ventricles exceeded the 97th percentile.
#: Mann-Whitney Test; *: chi-square or fisher’s exact test

ISSN: 1471-2393