Aortic root dilation in apparent Lujan-Fryns syndrome

Area of Science:

• Genetics
• Cardiology
• Neurology

Background:

• Lujan-Fryns syndrome (LFS) is a rare genetic disorder characterized by intellectual disability, distinctive facial features, and behavioral abnormalities.
• Cardiac anomalies have been infrequently reported in LFS, with limited understanding of their prevalence and spectrum.
• Differentiating LFS from other connective tissue disorders like Marfan syndrome (MS) is crucial for accurate diagnosis and management.

Observation:

• A case series involving a patient and his maternal uncle presenting with shared physical anomalies, behavioral characteristics, and cognitive disabilities consistent with Lujan-Fryns syndrome.
• Both individuals exhibited subaortic ventricular septal defect and aortic root dilation, significant cardiac abnormalities.
• These specific cardiac findings, ventricular septal defect and aortic root dilation, have not been previously documented in the existing literature on Lujan-Fryns syndrome.

Findings:

• The presence of subaortic ventricular septal defect and aortic root dilation in individuals diagnosed with Lujan-Fryns syndrome represents a novel observation.
• This finding expands the known spectrum of cardiac manifestations associated with Lujan-Fryns syndrome.
• The co-occurrence of these cardiac defects with characteristic LFS features supports the consideration of LFS as a connective tissue disorder.

Implications:

• The identification of these cardiac findings in LFS necessitates a re-evaluation of cardiac screening protocols for affected individuals.
• Understanding the potential for aortic root dilation in LFS is critical for differentiating it from Marfan syndrome, which also involves aortic pathology.
• Further research into the pathophysiology of LFS is warranted to elucidate the mechanisms underlying these connective tissue abnormalities and cardiac defects.