Rubinstein Taybi syndrome

Disease Overview

Rubinstein-Taybi syndrome (RTS) is a rare genetic disorder characterized by distinctive physical features, developmental challenges, and an increased risk of medical complications. The syndrome is marked by broad thumbs and toes, characteristic facial features, and varying degrees of intellectual disability.

Disease Category

Rare Genetic Disorder - Chromosomal Disorder - Congenital Malformation Syndrome

Synonyms

Broad Thumb-Hallux Syndrome
Rubinstein Syndrome
RTS

Signs & Symptoms

Physical Characteristics: - Broad, angulated thumbs and big toes - Distinctive facial features - Beaked nose - Downward-slanting eyes - High arched palate - Prominent ears - Short stature - Microcephaly

Developmental and Cognitive Features: - Intellectual disability (mild to moderate) - Developmental delays - Speech and language challenges - Learning difficulties

Medical Complications: - Feeding difficulties in infancy - Increased risk of tumors - Congenital heart defects - Respiratory infections - Hearing and vision problems - Skeletal abnormalities

Causes

Genetic Mutations: - Mutations in the CREBBP gene (most common, ~55% of cases) - Mutations in the EP300 gene (~5% of cases) - Sporadic mutations (de novo)

Inheritance Pattern: - Autosomal dominant - Most cases occur as new (spontaneous) mutations

Affected Populations

Prevalence: 1 in 100,000 to 1 in 125,000 live births
Affects males and females equally
No specific racial or ethnic predisposition

Disorders with Similar Symptoms

Floating-Harbor syndrome
Cornelia de Lange syndrome
Coffin-Siris syndrome
Dubowitz syndrome
KBG syndrome

Diagnosis

Diagnostic Approach: - Comprehensive clinical evaluation - Physical examination - Genetic testing - Molecular genetic testing - Chromosomal microarray analysis - Imaging studies (heart, skeletal) - Developmental assessments

Diagnostic Criteria: - Characteristic physical features - Genetic mutation confirmation - Developmental evaluation

Standard Therapies

Medical Management: - Regular medical monitoring - Treatment of specific medical complications - Cardiac evaluation - Hearing and vision screenings

Therapeutic Interventions: - Early intervention programs - Physical therapy - Occupational therapy - Speech and language therapy - Educational support - Behavioral therapy

Clinical Trials and Studies

Ongoing research into genetic mechanisms
Studies exploring potential targeted therapies
Longitudinal studies tracking developmental outcomes

References

National Institutes of Health (NIH)
Online Mendelian Inheritance in Man (OMIM)
Genetic and Rare Diseases Information Center

Programs & Resources

The Rubinstein-Taybi Syndrome Network
National Organization for Rare Disorders (NORD)
Genetic and Rare Diseases Information Center (GARD)
Support groups and patient advocacy organizations

Complete Report

Comprehensive medical information available through specialized genetic counseling centers, rare disease organizations, and medical genetics specialists.