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  • Title: Correlations of sinus, conical elevation, median depression of the lower lip and types of oral clefts.
    Author: Ranta R.
    Journal: Int J Oral Surg; 1985 Dec; 14(6):479-84. PubMed ID: 3936795.
    Abstract:
    The incidence of autosomal dominantly inherited Van der Woude's syndrome among Finnish patients with cleft lip and palate CL(P) and with isolated cleft palate (CP) is approximately 2.5%. The incidence of conical elevation of the lower lip (CE) is 39% in CP and 0.8% in CL(P) patients. A pathogenetic similarity of sinuses and CE's was noted. The following classification was used to study associations between sinuses and CE's: (1) sinus; bilateral, unilateral, atypical; (2) CE: bilateral, unilateral; (3) median depression of the lower lip (MD); (4) combined sinus and CE; (5) combined CE and MD. According to the classification developed, a group of 77 sinus patients and 156 CE and/or MD patients was classified in subgroups of CL(P), CP, Pierre Robin anomalad (PR) and non-cleft subjects. The findings were: the sinus was bilateral on 52%, unilateral in 34% and atypical in 14%; the CE without associated sinus was bilateral in all cases; the sinus was associated with CE in 77% of all sinus subjects. The highly increased incidence of the CE in the CP (92%) and in the CL(P) (61%) sinus groups compared to the incidences of CE in these groups in general (39% and 0.8%) shows a close relationship between these 2 disorders of the lower lip, but the similarity of the genetic etiology still remains unclear.
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