Iridogoniodysgenesis and Skeletal Anomalies

Background and History: 

The eye is separated into anterior and posterior chambers, separated by the iris or colored part of the eye.  Abnormal development of the iris and its insertion into the edge of cornea is sometimes called iridogoniodysgenesis and is frequently associated with glaucoma, usually in infancy or childhood.  This disorder involves the anterior chamber.  Such malformations may be part of a syndrome complex as in this disorder when there are skeletal changes.     


Clinical Correlations: 

The eye often appears large (in particular the cornea may be enlarged) which may be secondary to the increase in pressure as part of glaucoma.  The iris appears thin and has a concave surface and this thinning may result in the pupil being displaced from its normal position (corectopia).  The glaucoma is difficult to control either medically or surgically and blindness may result.

Other malformations, particularly of the skeletal system, are present.  The forehead appears broad, the nose is large as are the ears, the neck is short and the great toe is short.  The chest is abnormally wide.  The vertebrae may be malformed while the long bones of the arms and legs are thin and wide at the ends.



Only two families with this complex of findings have been reported.  Because each had three affected children (of both sexes) and no other relatives had any signs of similar problems, it is likely that two copies of a mutated gene are responsible which suggests that this is an autosomal recessive condition.  However, no gene mutation has been identified.  In such families, it is likely that one out of three future children will have this disorder.

Diagnosis and Prognosis: 

The major health risk is glaucoma which requires vigorous treatment.  Even then, the end result is blindness in some individuals.  The skeletal malformations usually do not need treatment.

Additional Information
Autosomal recessive