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Fig. 26 | Orphanet Journal of Rare Diseases

Fig. 26

From: Achondroplasia: a comprehensive clinical review

Fig. 26

Demonstration of wrist hypermobility in a school-aged child with achondroplasia. a Positive thumb sign (with wrist flexion the thumb touches the wrist); b positive envelope sign (with wrist flexion all of the fingers can touch the wrist); and c positive 5th finger sign (with wrist extension the 5th finger can be brought parallel to the wrist)

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