| Type . | Description . |
|---|---|
A | Normal |
B | Mild first web and thumb deficiency (narrow) |
C | Moderate–severe (syndactyly of thumb to index, thumb in palmar plane, lack of opposition, absence of thumb extension, hypoplastic thumb) |
D | Absent thumb |
| Type . | Description . |
|---|---|
A | Normal |
B | Mild first web and thumb deficiency (narrow) |
C | Moderate–severe (syndactyly of thumb to index, thumb in palmar plane, lack of opposition, absence of thumb extension, hypoplastic thumb) |
D | Absent thumb |
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