This review of 121 patients with hemifacial microsomia (HFM) revealed that 67 (55.4%) had extracraniofacial anomalies. Sixteen patients (13%) had one extracraniofacial anomaly and 51 patients (42.4%) had anomalies of multiple organ systems. There was no gender or side predominance in the cohort with the HFM "expanded spectrum." Central nervous system (CNS), cardiac, and skeletal anomalies were "associated" (i.e., had frequencies of 10% or more). Pulmonary, gastrointestinal, and renal deformities were equivocally associated. Statistical analysis indicated significant associations between several orbital, mandibular, ear, neural, and soft tissue (OMENS) variables and extracraniofacial anomalies. Patients with extracraniofacial structural defects had higher OMENS grades for individual craniofacial anatomic categories. Furthermore, patients with expanded spectrum had higher total OMENS scores. The frequency of cardiac anomalies (26%) supports the model of neural crest involvement in the pathogenesis of both hemifacial microsomia and conotruncal defects. The majority of the heart defects in this study were of either the outflow or septal type. We propose that the OMENS classification system for craniofacial anomalies of HFM be expanded to OMENS-Plus (+) to designate the presence of associated extracraniofacial anomalies.
This review of 121 patients with hemifacial microsomia (HFM) revealed that 67 (55.4%) had extracraniofacial anomalies. Sixteen patients (13%) had one extracraniofacial anomaly and 51 patients (42.4%) had anomalies of multiple organ systems. There was no gender or side predominance in the cohort with the HFM “expanded spectrum.” Central nervous system (CNS), cardiac, and skeletal anomalies were “associated” (i.e., had frequencies of 10% or more). Pulmonary, gastrointestinal, and renal deformities were equivocally associated. Statistical analysis indicated significant associations between several orbital, mandibular, ear, neural, and soft tissue (OMENS) variables and extracraniofacial anomalies. Patients with extracraniofacial structural defects had higher OMENS grades for individual craniofacial anatomic categories. Furthermore, patients with expanded spectrum had higher total OMENS scores. The frequency of cardiac anomalies (26%) supports the model of neural crest involvement in the pathogenesis of both hemifacial microsomia and conotruncal defects. The majority of the heart defects in this study were of either the outflow or septal type. We propose that the OMENS classification system for craniofacial anomalies of HFM be expanded to OMENS-Plus (+) to designate the presence of associated extracraniofacial anomalies.
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