Excess of parental non-righthandedness in children with right-sided cleft lip: a preliminary report

Area of Science:

• Craniofacial genetics
• Developmental biology
• Human genetics

Background:

• Cleft lip is a common congenital condition.
• Handedness, the preference for using one hand over the other, has a complex genetic and developmental basis.
• Previous research has explored genetic factors associated with cleft lip and handedness separately.

Purpose of the Study:

• To investigate the association between parental handedness and the side of cleft lip in their offspring.
• To explore potential shared etiological factors influencing both cleft lip laterality and handedness.

Main Methods:

• Retrospective analysis of parental handedness in families with children diagnosed with cleft lip.
• Comparison of non-right-handedness prevalence among parents of children with right-sided, left-sided, or bilateral cleft lip.
• Statistical analysis to determine the significance of observed associations.

Main Results:

• Parents of children with right-sided cleft lip exhibited a significantly higher rate of non-right-handedness compared to parents of children with left-sided or bilateral cleft lip.
• A notable trend towards non-right-handedness was observed in parents across all cleft lip types, though most pronounced in the right-sided group.
• The findings suggest a potential correlation between parental handedness and the specific manifestation of cleft lip.

Conclusions:

• Parental non-right-handedness may be a risk indicator for having a child with a right-sided cleft lip.
• These results point towards possible shared genetic or developmental pathways influencing both handedness and facial asymmetry in cleft lip.
• Further research is warranted to elucidate the underlying biological mechanisms connecting parental handedness and cleft lip laterality.