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GTR Home > Conditions/Phenotypes > Rubinstein-Taybi syndrome due to CREBBP mutations


Excerpted from the GeneReview: Rubinstein-Taybi Syndrome
Rubinstein-Taybi syndrome (RSTS) is characterized by distinctive facial features, broad and often angulated thumbs and halluces, short stature, and moderate-to-severe intellectual disability. Characteristic craniofacial features include downslanted palpebral fissures, low-hanging columella, high palate, grimacing smile, and talon cusps. Prenatal growth is often normal, then height, weight, and head circumference percentiles rapidly drop in the first few months of life. Short stature is typical in adulthood. Obesity may develop in childhood or adolescence. Average IQ ranges between 35 and 50; however, developmental outcome varies considerably. Some individuals with EP300-related RSTS have normal intellect. Additional features include ocular abnormalities, hearing loss, respiratory difficulties, congenital heart defects, renal abnormalities, cryptorchidism, feeding problems, recurrent infections, and severe constipation.

Genes See tests for all associated and related genes

  • Also known as: CBP, KAT3A, MKHK1, RSTS, RSTS1, CREBBP
    Summary: CREB binding protein

  • Also known as: KAT3B, MKHK2, RSTS2, p300, EP300
    Summary: E1A binding protein p300

Clinical features


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