Unusual traits associated with Robinow syndrome

Area of Science:

• Genetics and Rare Diseases
• Pediatric Cardiology
• Immunology

Background:

• Robinow syndrome is a rare genetic disorder characterized by specific facial features, skeletal abnormalities, and developmental delay.
• Previous studies have indicated a potential association between Robinow syndrome and congenital heart disease (CHD), though the spectrum of cardiac involvement is not fully defined.

Observation:

• Two unrelated families presented with Robinow syndrome, exhibiting a range of clinical manifestations.
• The first family displayed severe intrauterine growth restriction (IUGR), ligamentous laxity, hyperextensible joints, redundant skin folds, severe anemia, recurrent infections, altered T-cell populations (increased CD4+, decreased CD8+), and electromyography (EMG) abnormalities.
• The second family exhibited the Robinow phenotype alongside complex congenital heart disease, including pulmonary stenosis, tricuspid atresia, atrial septal defect (ASD), ventricular septal defect (VSD), double outlet right ventricle, and right atrial isomerism.

Findings:

• The study expands the phenotypic spectrum of Robinow syndrome to include severe IUGR, immune dysregulation, and EMG abnormalities.
• Congenital heart disease, particularly affecting the right side of the heart, is confirmed as a significant and potentially prominent feature in a subset of patients with Robinow syndrome.

Implications:

• These findings suggest that a broader range of clinical presentations should be considered in the diagnosis of Robinow syndrome.
• Early recognition and comprehensive evaluation for cardiac anomalies and other systemic features are crucial for affected individuals.
• Further research into the genetic and molecular underpinnings of these expanded phenotypes may reveal new therapeutic targets.