Staging of twin-twin transfusion syndrome

Area of Science:

• Perinatology
• Fetal Medicine
• Medical Imaging

Background:

• Twin-twin transfusion syndrome (TTTS) is a serious complication of monochorionic twin pregnancies.
• Accurate prognostic tools are crucial for managing TTTS and comparing treatment outcomes.

Purpose of the Study:

• To evaluate sonographic and clinical parameters for prognostic value in TTTS.
• To develop a staging classification for TTTS to aid in outcome prediction and treatment comparison.

Main Methods:

• Severe TTTS was defined by polyhydramnios and oligohydramnios.
• Doppler assessments of fetal vessels were performed.
• A novel TTTS staging system (Stages I-V) was developed based on bladder visualization, Doppler findings, hydrops, and demise.

Main Results:

• Survival rates differed significantly across the proposed TTTS stages (p=0.044).
• The new staging system demonstrated prognostic significance.
• Gestational age and size discordance were not predictive of outcomes.

Conclusions:

• The proposed TTTS staging system has prognostic value.
• This classification facilitates standardized comparison of outcomes across various TTTS treatment modalities.