Polydactyly cleft lip palate psychomotor retardation

Title

Other Names:

Joubert syndrome with orofaciodigital defect; OFD6; Oral-facial-digital syndrome type 6; Joubert syndrome with orofaciodigital defect; OFD6; Oral-facial-digital syndrome type 6; Orofaciodigital syndrome type 6; Polydactyly - cleft lip/palate - psychomotor retardation; Váradi syndrome; Váradi-Papp syndrome; Polydactyly-cleft lip/palate-psychomotor retardation syndrome See More

Categories:

Congenital and Genetic Diseases; Ear, Nose, and Throat Diseases; Mouth Diseases; Congenital and Genetic Diseases; Ear, Nose, and Throat Diseases; Mouth Diseases; Musculoskeletal Diseases; Nervous System Diseases See More

Summary Summary

The following summary is from Orphanet, a European reference portal for information on rare diseases and orphan drugs.

Orpha Number: 2754

Disease definition

Joubert syndrome with orofaciodigital defect (or oral-facial-digital syndrome type 6, OFD6) is a very rare subtype of Joubert syndrome and related disorders (JSRD, see this term) characterized by the neurological features of JS associated with orofacial anomalies and often polydactyly.

Epidemiology

Prevalence is unknown.

Clinical description

Typical oral findings include bifid or lobulated tongue, lingual hamartomas and multiple oral frenulae, but cleft lip and/or palate can also be present. Polydactyly is typically mesaxial with Y-shaped metacarpals, but can also be preaxial or postaxial. A subset of patients present with hypothalamic hamartoma that has never been reported in other JSRD subgroups.

Etiology

Two OFD6 patients, including one fetus, were found to carry a homozygous mutation in the TMEM216 gene (11q13.1), but mutations in this gene were excluded in several other patients, and the genetic basis of this condition still remains elusive.

Genetic counseling

Males and females are equally affected and an autosomal recessive pattern of inheritance was observed in familial cases.

Visit the Orphanet disease page for more resources.

Last updated: 7/7/2011

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In-Depth Information

The Monarch Initiative brings together data about this condition from humans and other species to help physicians and biomedical researchers. Monarch’s tools are designed to make it easier to compare the signs and symptoms (phenotypes) of different diseases and discover common features. This initiative is a collaboration between several academic institutions across the world and is funded by the National Institutes of Health. Visit the website to explore the biology of this condition.
Orphanet is a European reference portal for information on rare diseases and orphan drugs. Access to this database is free of charge.

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