Isolated Microtia With Anterior Hemispheric Polymicrogyria.

Area of Science:

• Neurology
• Developmental Biology
• Clinical Genetics

Background:

• Microtia, a congenital condition affecting ear development, is often part of broader genetic syndromes like the oculo-auriculo-vertebral spectrum.
• While the oculo-auriculo-vertebral spectrum is linked to various cerebral malformations, isolated microtia typically lacks such associations.
• The incidence of microtia-anotia is reported as 1.46 per 10,000 births in Italy.

Purpose of the Study:

• To report a unique case of isolated microtia associated with polymicrogyria.
• To highlight the unusual co-occurrence of these conditions and its implications for understanding developmental pathways.

Main Methods:

• Clinical examination of a male infant presenting with neonatal clonic seizure.
• Magnetic Resonance Imaging (MRI) of the brain to assess for structural abnormalities.
• Comprehensive evaluation including physical examination, genetic testing, metabolic screening, and radio imaging studies.

Main Results:

• The infant presented with isolated left-sided microtia and neonatal clonic seizure.
• Brain MRI revealed extensive polymicrogyria affecting the bilateral perisylvian and frontal cortex.
• No other associated anomalies were identified in genetic, metabolic, or radio imaging studies.

Conclusions:

• This case represents the first reported instance of polymicrogyria associated with isolated microtia.
• The findings challenge the conventional understanding of isolated microtia and suggest potential shared etiological factors or developmental disruptions.
• Further research is warranted to explore the underlying mechanisms connecting isolated microtia and polymicrogyria.