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[Clinico-epidemiologic study of microtia]
O Sánchez1, J R Méndez, E Gómez
1Unidad de Genética Médica, Escuela de Medicina, Universidad de Oriente, Ciudad Bolívar, Venezuela.
Investigacion Clinica
|April 4, 1998
Summary
Microtia, a congenital ear malformation, occurred in 3.8 per 10,000 newborns in Venezuela. Over half of cases were linked to other developmental issues, with males and unilateral presentations being more common.
Area of Science:
- Medical Science
- Genetics
- Epidemiology
Background:
- Microtia is a congenital absence of the auricle, potentially involving the external auditory meatus.
- Its global frequency ranges from 0.4 to 5.5 per 10,000 newborns.
- Understanding microtia's epidemiology and clinical characteristics is crucial for diagnosis and management.
Purpose of the Study:
- To clinically and epidemiologically characterize microtia in a large neonatal cohort.
- To determine the frequency and associated conditions of microtia in Venezuela.
Main Methods:
- A retrospective study of 97,759 neonates born between April 1978 and December 1994.
- Identification and clinical classification of 38 microtia cases.
- Epidemiological analysis of frequency, laterality, and associated malformations.
Main Results:
- Microtia frequency was 3.8 per 10,000 newborns.
- Males (63%) and unilateral cases (81.5%, predominantly right-sided) were more affected.
- Associated malformations were observed in 52.6% of cases, including developmental field defects and facio-auriculo-vertebral spectrum.
Conclusions:
- The study provides key epidemiological data on microtia in Venezuela.
- Microtia frequently occurs with other congenital anomalies, highlighting the need for comprehensive patient evaluation.
- The observed frequency falls within the intermediate range compared to other Latin American studies.