Rubinstein-Taybi syndrome (RTS) is a genetic disease. It involves broad thumbs and toes, short stature, distinctive facial features, and varying degrees of intellectual disability.
RTS is a rare condition. Defects in the genes CREBBP and EP300 are seen in some people with this condition.
Some people are missing the gene entirely. This is more typical in people with more severe problems.
Most cases are sporadic (not passed down through families). They are likely due to a new genetic defect that occurs either in the sperm or egg cells, or at the time of conception.
- Broadening of the thumbs and big toes
- Excess hair on body (hirsutism)
- Heart defects, possibly requiring surgery
- Intellectual disability
- Short stature that is noticeable after birth
- Slow development of cognitive skills
- Slow development of motor skills accompanied by low muscle tone
Other signs and symptoms may include:
- Absent or extra kidney, and other problems with kidney or bladder
- An underdeveloped bone in the midface
- Unsteady or stiff walking gait
- Downward-slanted eyes
- Low-set ears or malformed ears
- Drooping eyelid (ptosis)
- Coloboma (a defect in the iris of the eye)
- Microcephaly (excessively small head)
- Narrow, small, or recessed mouth with crowded teeth
- Prominent or "beaked" nose
- Thick and arched eyebrows with long eyelashes
- Undescended testicle (cryptorchidism), or other testicular problems
Exams and Tests
The health care provider will perform a physical exam. Blood tests and x-rays may also be done.
Genetic tests can be done to determine if the genes involved in this disease are missing or changed.
There is no specific treatment for RTS. However, the following treatments can be used to manage problems commonly associated with the condition.
- Surgery to repair the bones in the thumbs or toes can sometimes improve grasp or relieve discomfort.
- Early intervention programs and special education to address developmental disabilities.
- Referral to behavioral specialists and support groups for family members.
- Medical treatment for heart defects, hearing loss, and eye abnormalities.
- Treatment for constipation and gastroesophageal reflux (GERD).
Rubinstein-Taybi Parents Group USA: www.rubinstein-taybi.com
The majority of children can learn to read at an elementary level. The majority have delayed motor development, but on average, they learn to walk by 2 1/2 years of age.
Complications depend on what part of the body is affected. Complications may include:
- Feeding problems in infants
- Repeated ear infections and hearing loss
- Problems with the shape of the heart
- Abnormal heartbeat
- Scarring of the skin
When to Contact a Medical Professional
An appointment with a geneticist is recommended if the provider finds signs of RTS.
Genetic counseling is advised for couples with a family history of this disease who are planning a pregnancy.
Anna C. Edens Hurst, MD, MS, Assistant Professor in Medical Genetics, The University of Alabama at Birmingham, Birmingham, AL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.
This information should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. © 1997- 2007 A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.