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Types of 81 fetuses with congenital microtia.
| Type of microtia | n | Complicated with other structural anomalies (n) | Genetic abnormalities (n) |
|---|---|---|---|
| I | 1 | 0 | 0 |
| II | 17 | 6 | 1 |
| III | 62 | 14 | 9 |
| IV | 3 | 2 | 0 |
Bilateral microtia was found in 2 cases and unilateral microtia in 79 cases. Forty four cases performed chromosome karyotype analysis and gene detection.
