Atypical expanded-spectrum hemifacial microsomia: a case report.
Summary
This case report details an infant with expanded hemifacial microsomia (HFM) and multiple systemic anomalies. The findings suggest a disorder in blastogenesis, rather than a localized vascular issue, may cause HFM.
Area of Science:
- Developmental Biology
- Clinical Genetics
- Craniofacial Anomalies
Background:
- Hemifacial microsomia (HFM) is a spectrum of congenital anomalies affecting facial development.
- Current theories on HFM etiology include vascular disruption and genetic factors.
- Understanding the underlying mechanisms of HFM is crucial for diagnosis and management.
Observation:
- A case of an African American infant with expanded hemifacial microsomia (HFM) and extensive systemic malformations is presented.
- Craniofacial findings included holoprosencephaly, cleft lip/palate, microtia, and mandibular hypoplasia.
- Systemic anomalies encompassed renal, cardiac, skeletal, and limb malformations, with no identified molecular diagnosis.
Findings:
- The patient exhibited a wide range of bilateral and asymmetrical anomalies, inconsistent with localized vasculogenic disruption.
- The complex presentation of craniofacial and systemic malformations supports a broader developmental field defect.
- The findings challenge the sole attribution of HFM to stapedial artery disruption during early fetal development.
Implications:
- The case suggests that disorders in blastogenesis, affecting early embryonic development, may be a significant cause of expanded spectrum HFM.
- This broadens the etiological considerations for HFM beyond localized vascular events.
- Further research into blastogenesis is warranted to elucidate the pathogenesis of complex congenital anomalies like HFM.
