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Holt-Oram syndrome — Clinical Guidelines

Overview

Holt-Oram syndrome is an autosomal dominant disorder characterized by skeletal abnormalities, particularly of the upper limbs, and congenital heart defects, often involving the septa 1 3.

Diagnosis

Key Diagnostic Criteria: Radial ray defects (e.g., triphalangeal thumbs, radial hypoplasia), septal cardiac defects 1 3.

Recommended Tests: Detailed fetal ultrasonography to assess cardiac and skeletal anomalies 6.

Genetic Testing: Mutation analysis of TBX5 gene on chromosome 12q24.1; consider chromosomal microarray for deletions like 14q 2 4.

Management

Cardiac Interventions: Surgical correction for severe cardiac defects (e.g., ventricular septal defect, total anomalous pulmonary venous drainage) 5.

Orthopedic Support: Prosthetics or surgical interventions for severe limb malformations 1.

Multidisciplinary Care: Collaboration with cardiologists, orthopedic surgeons, and genetic counselors 3 6.

Special Populations

Pregnancy: Antenatal ultrasonography crucial for early detection and counseling 6.

Pediatrics: Variable clinical expression; close monitoring for both cardiac and skeletal issues 3 4.

Comorbidities: No specific recommendations noted; manage based on individual defect severity 1 5.

Key Recommendations

Perform detailed fetal ultrasonography in pregnant women at risk for Holt-Oram syndrome to detect cardiac and skeletal anomalies (Evidence: Moderate 6).

Consider genetic testing focusing on TBX5 mutations and chromosomal microarray analysis for atypical presentations (Evidence: Moderate 2 4).

Offer multidisciplinary care involving specialists in cardiology and orthopedics to address varied clinical manifestations (Evidence: Expert opinion 3).

References

1 Smets K, Mortier G, Zecic A. Perinatal/neonatal case presentation: unexpected severe respiratory insufficiency in a newborn with Holt-Oram Syndrome. Journal of perinatology : official journal of the California Perinatal Association 2005. link 2 Le Meur N, Goldenberg A, Michel-Adde C, Drouin-Garraud V, Blaysat G, Marret S et al.. Molecular characterization of a 14q deletion in a boy with features of Holt-Oram syndrome. American journal of medical genetics. Part A 2005. link 3 Oğur G, Gül D, Lenk MK, Imirzalioğlu N, Alpay F, Oğur E. Variable clinical expression of Holt-Oram syndrome in three generations. The Turkish journal of pediatrics 1998. link 4 Braulke I, Herzog S, Thies U, Zoll B. Holt-Oram syndrome in four half-siblings with unaffected parents: brief clinical report. Clinical genetics 1991. link 5 Marcus RH, Marcus BD, Levin SE. The upper limb-cardiovascular syndrome (Holt-Oram syndrome) in a South African family. South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 1985. link 6 Muller LM, De Jong G, Van Heerden KM. The antenatal ultrasonographic detection of the Holt-Oram syndrome. South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde 1985. link

Holt-Oram syndrome