Cebocephalus associated with trisomy 13-15 mosaicism

Area of Science:

• Medical Genetics
• Developmental Biology
• Clinical Dysmorphology

Background:

• Cebocephaly is a rare congenital anomaly characterized by the fusion of the orbits.
• It is often associated with severe brain malformations and other craniofacial abnormalities.
• The genetic underpinnings of cebocephaly are not fully understood, but chromosomal abnormalities have been implicated.

Observation:

• A case of cebocephaly is presented in a newborn.
• Genetic analysis revealed a 10% mosaicism of trisomy 13-15 in the affected infant.
• Karyotype analysis of both parents showed normal chromosomal complements.

Findings:

• The presence of 10% mosaic trisomy 13-15 in a cebocephaly case.
• This finding expands the spectrum of chromosomal abnormalities associated with cebocephaly.
• Previous associations include deletions of chromosome 18 and full trisomy 13-15.

Implications:

• Highlights the importance of detailed cytogenetic analysis in cases of cebocephaly, even with parental normal karyotypes.
• Suggests that mosaic trisomy 13-15 may be a contributing factor to cebocephaly development.
• Further research is needed to elucidate the precise mechanisms linking chromosomal mosaicism to cebocephaly.