XK-aprosencephaly and related entities

Area of Science:

• Genetics and Developmental Biology
• Neuroscience
• Pediatric Pathology

Background:

• XK atelen/aprosencephaly syndrome is a rare congenital disorder.
• Characterization of this syndrome is limited, particularly regarding its genetic basis and associated pathologies.

Purpose of the Study:

• To provide further biological characterization of XK atelen/aprosencephaly syndrome.
• To investigate potential genetic mechanisms and associated anomalies, including orbital tumors and movement disorders.

Main Methods:

• Clinical case study of two infants with XK atelen/aprosencephaly syndrome.
• Karyotyping and induced chromosome breakage analysis.
• Autopsy and histopathological examination of affected tissues.

Main Results:

• One infant presented with prolonged survival and familial occurrence, suggesting possible germinal mosaicism or autosomal recessive inheritance.
• Slightly increased chromosome breakage in one infant hints at a potential DNA repair defect.
• The orbital tumor comprised dystopic neural tissue; absence of atelen/aprosencephalic structures correlated with arthrogryposis-like prenatal movement disorder.

Conclusions:

• XK atelen/aprosencephaly syndrome may involve a DNA repair defect.
• The syndrome can present with diverse anomalies, including orbital tumors and prenatal movement disorders.
• Further research is needed to elucidate the genetic etiology and pathogenesis.