Absent right superior vena cava with persistent left superior vena cava: two case reports

Area of Science:

• Cardiology
• Pediatric Cardiology
• Congenital Heart Disease

Background:

• Persistent left superior vena cava (PLSVC) is a rare congenital anomaly.
• While often asymptomatic, PLSVC can be associated with other cardiac defects.
• The coexistence of PLSVC with an absent right superior vena cava (RSVC) is exceptionally uncommon.

Observation:

• Two pediatric patients presented with ventricular septal defects.
• Diagnostic angiography revealed the presence of PLSVC.
• Simultaneously, the absence of the right superior vena cava was confirmed.

Findings:

• Confirmed diagnosis of persistent left superior vena cava (PLSVC) in both patients.
• Confirmed absence of the right superior vena cava (RSVC) in both patients.
• The findings highlight a rare presentation of superior vena cava anomaly.

Implications:

• This case underscores the importance of thorough vascular assessment in pediatric patients with congenital heart defects.
• Recognizing this rare anomaly is crucial for accurate diagnosis and appropriate clinical management.
• Further research into the embryological basis and clinical significance of absent RSVC with PLSVC is warranted.