Ultrasound evaluation of the hips and histological correlations in Ellis van Creveld Syndrome

Area of Science:

• Medical Genetics
• Skeletal Dysplasias
• Pediatric Orthopedics

Background:

• Ellis van Creveld Syndrome (EVCs) is a chondroectodermal dysplasia characterized by limb dwarfism, polydactyly, and congenital heart defects.
• Hip abnormalities are common in skeletal dysplasias, but specific ultrasonographic and histological findings in EVCs are not well-defined.

Purpose of the Study:

• To evaluate neonatal ultrasonographic hip development and acetabular morphology in patients with EVCs.
• To correlate ultrasonographic findings with histological examination of growth plate morphology.

Main Methods:

• Neonatal ultrasonography was performed to assess hip development and acetabular morphology.
• Histological analysis of phalangeal growth plates was conducted using alcian blue/PAS and E.E. staining.
• Comparison between ultrasonographic and histological findings was performed.

Main Results:

• Ultrasonography revealed flat, abnormal acetabula with reduced alpha and beta angles and irregular echoes.
• Large, early ossified proximal femoral epiphyses were noted within the acetabular cavities.
• Histology showed distorted growth plates with irregular column formation and abnormal hypertrophic cell distribution, correlating with ultrasound findings.

Conclusions:

• Ultrasonographic hip morphology in EVCs corresponds to underlying histological growth plate abnormalities.
• Early ossification of the proximal femoral epiphysis is a potential diagnostic feature of EVCs, detectable prenatally.
• This study highlights the utility of ultrasound in characterizing skeletal abnormalities in EVCs.