Ethmocephaly with amniotic band syndrome

Area of Science:

• Medical Genetics
• Developmental Biology
• Teratology

Background:

• Holoprosencephaly (HPE) is a spectrum of congenital brain malformations resulting from incomplete forebrain cleavage.
• Ethmocephaly represents the rarest form of HPE, characterized by cyclopia or ethmocephaly, proboscis, hypotelorism, and microphthalmia.
• Amniotic band syndrome (ABS) is a rare congenital disorder involving constrictive bands affecting fetal development.

Observation:

• This report describes a unique case of a neonate presenting with features of both ethmocephaly and amniotic band syndrome.
• The patient exhibited characteristic facial anomalies of ethmocephaly, including a proboscis, hypotelorism, and microphthalmia.
• Evidence of amniotic bands was also noted, suggesting a complex etiology.

Findings:

• The co-occurrence of ethmocephaly and amniotic band syndrome is exceptionally rare, with this case potentially representing the first documented instance in medical literature.
• This finding highlights the complex interplay of genetic and environmental factors in congenital malformations.
• Detailed phenotypic description and diagnostic imaging confirmed the dual diagnosis.

Implications:

• This case expands the known spectrum of presentations for both holoprosencephaly and amniotic band syndrome.
• Understanding such rare co-occurrences can improve diagnostic accuracy and genetic counseling for affected families.
• Further research into the underlying mechanisms is warranted to elucidate the etiology of this rare combination.