Analysis of familial incidence of non-syndromic cleft lip and palate in a Brazilian population

ABSTRACT

Background: The purpose of this study is to follow the familial incidence of non-syndromic or isolated cleft lip,with or without cleft palate (NSCL/P), and to analyze the relation ships between the type of NSCL/P in the affected individual and his/her parent, looking at children in the first grade. Material and Methods: To investigate the familial incidence of NSCL/P we analyzed the records of 185 patients from 2004-2008, retrospectively. Detailed histories were collected regarding the familial incidence of NSCL/P.For the 185 individuals, the relationship between the type of NSCL/P and the sociodemographic and personal characteristics of the affected person and her/his cleft relatives was obtained. Results: The individuals were 42 carriers of CL, 109 with CLP (joined in one group) and 34 with CP (p<0.001).Of the total of participants, 65 (35.13%) presented a positive history of cleft in their families and 120 (64.86%)presented a negative history (p<0.001). There were differences between the cleft groups according to types ofcleft and positive familial history (p<0.001). In both groups, the relatives with higher incidence of NSCL/P were cousins, with the same pattern of distribution between the two groups (p=0.175).Conclusions: Most frequently, fissures result from CL/CLP with no familial history. However, CL/CLP was foundin familial cases and cousins were the relative type more likely to be affected (AU)

RESUMEN

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