Partial monosomy 8p with minimal dysmorphic signs

Area of Science:

• Human Genetics
• Cytogenetics
• Molecular Biology

Background:

• Chromosome 8 deletions can lead to various developmental abnormalities.
• Understanding the precise breakpoints of deletions is crucial for genotype-phenotype correlation.
• Previous studies have identified deletions on the short arm of chromosome 8, but the extent of this specific deletion is novel.

Observation:

• A female patient with a 46,XX karyotype was analyzed.
• The patient exhibited intellectual disability and several dysmorphic features.
• Red blood cell glutathione reductase levels were found to be within the normal range.

Findings:

• A terminal deletion on the short arm of chromosome 8, specifically del(8)(p23----pter), was identified.
• This deletion appears to be the smallest reported terminal deletion on chromosome 8 to date.
• The identified genetic anomaly provides a refined understanding of the critical region on 8p.

Implications:

• This case expands the spectrum of known chromosomal abnormalities associated with 8p deletions.
• The findings contribute to the understanding of the genetic basis of intellectual disability and dysmorphic features.
• Further research may elucidate the specific genes within this minimal deleted region and their roles in development.