Unilateral carpal bone deformity in mother and son

Area of Science:

• Orthopedics
• Genetics
• Developmental Biology

Background:

• Congenital anomalies of the hand and wrist are diverse, often presenting with complex etiologies.
• Carpal bone dysplasia is a recognized feature in various genetic syndromes and developmental disorders.
• Unilateral presentations are less common, posing diagnostic challenges.

Observation:

• A familial case of unilateral upper limb malformation was identified in a mother and son.
• Key features include absence of most proximal carpal bones and dysplasia of the distal carpal bones.
• Forearm deformity was also noted, consistent with a developmental anomaly.

Findings:

• The condition is characterized by unilateral, non-progressive carpal bone anomalies.
• Absence of proximal carpal bones combined with distal carpal bone dysplasia is a unique presentation.
• The familial occurrence suggests a potential genetic component.

Implications:

• This case highlights a distinct entity of congenital unilateral carpal bone absence and dysplasia.
• Further research may elucidate the specific genetic or developmental pathways involved.
• Understanding such distinct entities aids in accurate diagnosis and genetic counseling for limb malformations.