The metacarpal index in normal children

Area of Science:

• Pediatric radiology
• Skeletal development
• Genetic disorder screening

Background:

• The metacarpal index (MCI) is a radiographic measurement assessing metacarpal bone slenderness.
• MCI is utilized as a screening tool for Marfan syndrome, a connective tissue disorder.
• Understanding normal MCI development in children is crucial for accurate Marfan syndrome assessment.

Purpose of the Study:

• To establish normative data for the metacarpal index (MCI) in a pediatric population.
• To determine the age at which MCI reaches adult reference ranges in healthy children.
• To provide reference values for the metacarpal index in pediatric skeletal development.

Main Methods:

• Radiographic measurements of metacarpal bone dimensions were performed.
• The metacarpal index (MCI) was calculated for each subject.
• Data were collected from 185 healthy children aged 2 to 18 years.

Main Results:

• The metacarpal index (MCI) demonstrated a significant increase with age in the studied pediatric cohort.
• MCI values transitioned from lower childhood ranges to adult ranges by approximately 10 to 11 years of age.
• This indicates a period of substantial metacarpal bone maturation during late childhood and early adolescence.

Conclusions:

• The metacarpal index (MCI) follows a predictable developmental trajectory in children.
• Normal MCI values in children aged 10-11 years approximate adult values.
• These findings refine the use of MCI as a developmental marker and screening tool for Marfan syndrome in pediatric populations.