Baraitser-Winter Syndrome 2

Background and History: 

This is a rare heritable condition caused by a gene mutation, not to be confused with Baraitser-Winter Syndrome 1 which is caused by a different mutation.  Both conditions can be clinically similar and involve multiple organ systems resulting in significant health problems. 

Clinical Correlations: 

There is considerable variability in signs and symptoms among patients and not all have all of the features.  Short stature, small heads, and intellectual disability are common.  The eyes appear too far apart, the eyebrows are unusually high, and the eyelids usually droop (ptosis).  The eyes including the colored part of the eye (iris) may have physical defects but nothing is known about the level of vision.  Imaging of the brain reveals physical malformations.  Hearing loss is common.


A single mutation in the ACTG1 gene is responsible for this condition.  While the expected pattern of inheritance is vertical (autosomal dominant) and would be expected to pass from parent to offspring, in reality all cases occur sporadically.  This is not uncommon among autosomal dominant conditions when reproduction of affected individuals is limited. 

Diagnosis and Prognosis: 

The physical and mental alterations are most likely detected by pediatricians but other specialists such as neurologists, neurosurgeons, and ophthalmologists are likely to be consulted.  There is no specific treatment available but special education and physical therapy may be helpful.

Additional Information
Autosomal recessive