48,XYYY
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Description
The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.
Orpha Number: 99329
Definition
A rare Y chromosome number anomaly that affects only males and is characterized by mild-moderate developmental delay (especially speech), normal to mild intellectual disability, large, irregular teeth with poor enamel, tall stature and acne. Radioulnar synostosis and clinodactyly have also been associated. Boys generally present normal genitalia, while hypogonadism and infertility is frequently reported in adult males.
Visit the Orphanet disease page for more resources.
Source: GARD Last updated on 05-01-20
Symptoms
Symptoms and their Known Frequencies
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