Background: Understanding the genetic etiologies of cleft lip and palate (CLP) is important for improved prevention, treatment, and prognosis for patients affected by CLP.
Objective: To report the prevalence and the type of associated syndromes in Northeastern Thai patients with CLP.
Material and Method: A retrospective study of 123 cleft lip/palate children aged 4-5 years was carried out at the Tawanchai Cleft Center, Khon Kaen University during the period from October to December 2011. Data were collected by reviewing the patient’s medical records.
Results: Seventeen (14%) of the 123 children had multiple malformations and five (4%) of these children had associated syndromes. Syndromes were identified in 5 (29%) of the 17 children who had associated malformations. The syndromes were Apert, Cleft lip/palate-ectodermal dysplasia, Kabuki, Oculo-Auriculo-Vertebral Spectrum, and Velocardiofacial syndrome.
Conclusion: Recognition of the associated syndrome in a patient with CLP is essential to assess the problem of the patient, provide necessary treatment and the appropriate methodology of prevention.

Keywords: Children, Cleft lip, Cleft palate, Syndrome