peri032.jpg (73443 bytes)
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Here is an example of syndactyly in which several fingers are fused into one large digit. The thumb and forefinger are fused in this case.

peri007.jpg (69558 bytes)
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Polydactyly, particularly of all extremities, strongly suggests trisomy 13. Extra toes are seen here on each foot.

peri008.jpg (71026 bytes)
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An extra finger (polydactyly) is present on this hand of an infant with trisomy 13.

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