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Amelia: incidence and associated defects in a large population
U G Froster-Iskenius1, P A Baird
1Department of Obstetrics and Gynaecology, Lubeck Medical University, Federal Republic of Germany.
Teratology
|January 1, 1990
Summary
Amelia, a rare congenital limb absence, occurs in 0.15 per 10,000 livebirths. Associated malformations are common, particularly with lower limb amelia, but familial recurrence is not observed.
Area of Science:
- Medical Genetics
- Developmental Biology
- Public Health
Background:
- Amelia, the complete absence of a limb, is a rare congenital anomaly.
- Understanding the incidence and associated conditions of amelia is crucial for medical diagnosis and management.
Purpose of the Study:
- To determine the incidence of amelia in a large livebirth population.
- To investigate patterns of associated malformations and familial recurrence.
Main Methods:
- Utilized a population-based registry with multiple ascertainment sources.
- Analyzed records of 1,213,913 livebirths from 1952-1984 in British Columbia.
- Identified 18 cases of amelia for incidence and association analysis.
Main Results:
- A minimal incidence rate of 0.15 per 10,000 livebirths was established.
- Amelia affected upper and lower limbs equally; 61% of cases had other organ system malformations.
- A distinct pattern of omphalocele and diaphragmatic defects was noted in lower limb amelia cases.
Conclusions:
- Amelia is a rare birth defect with a low incidence rate.
- Associated malformations are frequent, suggesting potential shared developmental pathways.
- No evidence of familial recurrence was found, indicating sporadic occurrence in this cohort.