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Table 1 Physical and Medical Features Associated with Trisomy X

From: A review of trisomy X (47,XXX)

Feature

Estimated frequency based on current available data[10, 19, 22, 33, 44]

Tall stature >75th percentile

80-89%

Epicanthal folds

32-46%

Clinodactyly

42-65%

Hypotonia in infancy

55-71%

Genitourinary malformations

5-16%

Seizure disorder

11-15%

Intention tremor

6-20%

Congenital hip dysplasia

2-12%

Constipation/Abdominal pains

12-45%

Premature ovarian failure

unknown