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Radiologic changes in infancy in McKusick cartilage hair hypoplasia
1Department of Diagnostic Imaging and Radiology, Children's National Medical Center and the George Washington University School of Medicine and Health Sciences, Washington, DC, USA. ronald_glass@smtplink.mssm.edu
American Journal of Medical Genetics
|September 24, 1999
Summary
Cartilage hair hypoplasia (CHH) is a rare skeletal dysplasia. A new study highlights anterior sternal angulation as a key diagnostic sign in young children with CHH.
Area of Science:
- Pediatric Radiology
- Skeletal Dysplasias
- Genetics
Background:
- Cartilage hair hypoplasia (CHH), also known as metaphyseal dysplasia McKusick type, is a rare skeletal dysplasia.
- CHH is characterized by short stature, fine hair, and a high incidence of immune deficiency, Hirschsprung disease, and malignancy.
- Early diagnosis can be challenging due to subtle clinical findings and elusive radiographic changes in young children.
Observation:
- This study presents four children under the age of two diagnosed with CHH.
- Radiographic confirmation was obtained for all cases.
- A previously undescribed radiological sign, anterior angulation of the entire sternum, was observed.
Findings:
- Anterior angulation of the sternum is identified as a distinct radiological marker for CHH.
- This sign aids in the early diagnosis of CHH in infants and young children.
- The findings expand the radiological diagnostic criteria for this skeletal dysplasia.
Implications:
- Early and accurate diagnosis of CHH can lead to timely management of associated conditions like immune deficiency and Hirschsprung disease.
- Recognition of the sternal angulation sign can improve diagnostic accuracy in pediatric skeletal dysplasias.
- Further research into the genetic and developmental basis of this sternal anomaly in CHH is warranted.