Twin-twin transfusion syndrome

Area of Science:

• Perinatology
• Maternal-Fetal Medicine
• Fetal Surgery

Background:

• Twin-twin transfusion syndrome (TTTS) is a serious complication unique to monochorionic pregnancies.
• It arises from abnormal placental vascular connections (anastomoses) leading to unequal blood flow between twins.
• Diagnosis involves ultrasound detection of amniotic fluid imbalances (oligohydramnios and polyhydramnios).

Purpose of the Study:

• To review the effects of selective laser photocoagulation of placental vessels (SLPCV) on fetal growth and circulation in TTTS.
• To explore prognostic factors associated with TTTS.
• To discuss the limitations of the Quintero staging system and propose a new staging system (Rossi staging system).

Main Methods:

• Literature review focusing on SLPCV efficacy in TTTS treatment.
• Analysis of studies on prognostic factors in TTTS.
• Critical evaluation of current TTTS staging systems and proposal of a new system.

Main Results:

• Growing evidence supports SLPCV as a highly efficacious therapy for TTTS compared to amnioreduction.
• The review details the impact of SLPCV on fetal growth and circulation.
• A new staging system, the Rossi staging system, is proposed for assessing TTTS severity.

Conclusions:

• SLPCV is an effective treatment for TTTS, demonstrating superior outcomes.
• Further research is needed to clarify the natural history of TTTS and refine prognostic factors.
• The proposed Rossi staging system aims to improve TTTS severity assessment at presentation.