The Antley-Bixler syndrome

Area of Science:

• Medical Genetics
• Pediatric Orthopedics
• Developmental Biology

Background:

• Antley-Bixler syndrome (ABS) is a rare, autosomal recessive disorder.
• Characterized by craniosynostosis, midface hypoplasia, and radiohumeral synostosis.
• Previous reports have described limited cases, necessitating further characterization.

Observation:

• Three new unrelated patients (two female, one male) with ABS were evaluated.
• This brings the total reported cases to five.
• Clinical evaluation revealed consistent features across all patients.

Findings:

• Consistent findings include brachycephaly, midface hypoplasia, dysplastic ears, radiohumeral synostosis, and joint contractures.
• Radiographic evidence of craniosynostosis was present in four of five patients.
• A severely shortened cranial base was observed in all five patients, alongside variable femoral bowing and neonatal fractures.

Implications:

• These findings expand the understanding of Antley-Bixler syndrome's phenotypic spectrum.
• Highlights the importance of early diagnosis and genetic counseling for affected families.
• Further research into the molecular mechanisms underlying ABS is warranted.