Persistent left superior vena cava draining into the left atrium.

Area of Science:

• Cardiology
• Infectious Diseases
• Radiology

Background:

• Necrotising fasciitis is a severe soft tissue infection requiring prompt diagnosis and management.
• Congenital anomalies of the superior vena cava, such as persistent left superior vena cava (PLSVC), are often asymptomatic and discovered incidentally.

Observation:

• A 40-year-old male presented with necrotising fasciitis of the right thigh, with dental abscesses suspected as the infectious source.
• During diagnostic workup for the infection, transesophageal echocardiography incidentally revealed a persistent left superior vena cava, later confirmed by cardiac MRI.
• The patient subsequently developed altered mental status attributed to systemic emboli, identified via head MRI.

Findings:

• The patient received 6 weeks of intravenous antibiotic therapy for necrotising fasciitis.
• The persistent left superior vena cava was identified as an incidental congenital anomaly.
• Systemic emboli were diagnosed as the cause of altered mental status.

Implications:

• This case underscores the importance of comprehensive evaluation in patients with severe infections, as incidental findings can reveal significant underlying conditions.
• The presence of a persistent left superior vena cava may have implications for future medical interventions and cardiovascular health.
• Co-occurrence of severe infection, congenital vascular anomaly, and embolic events highlights the complexity of patient management and the need for multidisciplinary care.