Massive myocardial calcification in second-trimester fetuses: antenatal detection and causes

Area of Science:

• Cardiology
• Prenatal Diagnosis
• Pathology

Background:

• Antenatal ultrasound is vital for detecting fetal abnormalities.
• Myocardial calcifications can be associated with various fetal conditions.
• Distinguishing calcifications from cardiac tumors is critical for management.

Observation:

• Four second-trimester fetuses presented with massive myocardial calcifications.
• Associated conditions included cardiac rhabdomyomas, arthrogryposis with hypoxic-ischemic brain damage, hydrops fetalis with cardiac malformations, and congenital heart block with maternal autoantibodies.
• Etiologies varied, including hypoxic-ischemic damage and immunological mechanisms.

Findings:

• Myocardial calcifications in fetuses can stem from hypoxic-ischemic events or maternal immunological factors.
• Accurate differentiation between myocardial calcifications and cardiac rhabdomyomas is essential for distinct genetic counseling.
• Presence of calcifications necessitates thorough investigation, including postmortem examination when pregnancy is terminated or fetal demise occurs.

Implications:

• Early and accurate diagnosis of fetal myocardial calcifications is crucial for appropriate genetic counseling and management.
• Comprehensive postmortem evaluation aids in understanding the pathogenesis of antenatal myocardial calcifications.
• Identifying associated conditions and underlying mechanisms improves prenatal care and family guidance.