Twin–twin transfusion and laser therapyBehrendt, Nicholas; Galan, Henry L.Current Opinion in Obstetrics and Gynecology: April 2016 - Volume 28 - Issue 2 - p 79–85 doi: 10.1097/GCO.0000000000000247 MATERNAL FETAL MEDICINE: Edited by James F. Smith Jr. Buy Abstract Author InformationAuthors Article MetricsMetrics Purpose of review Twin-to-twin transfusion syndrome (TTTS) is an uncommon, but dangerous, complication of monochorionic diamniotic twin gestations. The purpose of this review is to provide an update on the evolving treatments in TTTS as it pertains primarily to laser photocoagulation, as well as to provide recently published information on outcomes. Recent findings The Solomon laser technique, in which selective fetoscopic laser photocoagulation is first performed and then followed by laser of the vascular equator from one side of the placenta to the other, reduces TTTS complications of twin anemia–polycythemia syndrome and recurrent TTTS. The addition of fetal echocardiography to the historical staging of TTTS adds important information that may guide future therapies. The postlaser ablation rate of neurodevelopmental delay in TTTS has recently been reported to be 14%. Cotwin demise is a significant complication of untreated TTTS and survival carries a 25% risk of cystic periventricular leukomalacia, middle cerebral artery infarction, and injury to other central nervous system structures as noted by neuroimaging. Summary Laser therapy for TTTS is clearly the only therapy that halts the disease process, allows both fetuses an opportunity to survive and protects a surviving cotwin in the event of the demise of one twin. Laser techniques have evolved greatly over the last 25 years and recent reports with the addition of the Solomon technique appearing to reduce some postlaser complications (twin anemia–polycythemia sequence and recurrent TTTS). Future focus of TTTS therapy should be centered on understanding the pathophysiology of the disease better with improvement in staging of the disease and on comparison of different laser techniques with the overall goal of not only increasing twin survival rates but also reducing long term neurodevelopmental morbidity. Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Colorado Institute for Maternal and Fetal Health, Aurora, Colorado, USA Correspondence to Henry L. Galan, MD, University of Colorado at Denver Health Sciences Center, Aurora, CO 80045, USA. E-mail: Henry.firstname.lastname@example.org Copyright © 2016 YEAR Wolters Kluwer Health, Inc. All rights reserved.