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[Cranial dysostoses].

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Craniofacial Abnormalities↗

[Dysostoses and postural limb abnormalities in rapidly growing dogs].

Congenital and acquired dysostosis was studied on two litters of Great Danes. One litter of puppies were descendants of dogs with normal hips, the other of dysplastic animals. Both litters were fed according to NCR standards, the second however ad libitum. One puppy of parents with normal hips demonstrated already with 6 weeks epi- and metaphyseal dysostosis and severe angular deformities of the thoracic and pelvic limbs. Hip dysplasia was diagnosed in three of five puppies from dysplastic dogs. In addition, one puppy showed Wobbler symptoms. The extent and frequency of the alterations were, in comparison to earlier investigations, unexpectedly high. It can be assumed that the examined dogs were genetically predisposed for dysostosis. Our therapeutic procedures are presented.

Animals↗

A Bayesian method for the estimation of penetrance: application to mandibulofacial and frontonasal dysostoses.

We describe a Bayesian method of estimating penetrance from genealogical data. It consists of calculating the likelihood of the data alone to make inferences about penetrance without sample space considerations. The method is applied to mandibulofacial dysostosis giving a penetrance of 0.908 with 0.95 credible interval of [0.809; 0.972] and to frontonasal dysostosis giving a penetrance of 0.670 with 0.95 credible interval of [0.457; 0.851].

Craniofacial Dysostosis↗

Treatment of obstructive sleep apnoea using nasal CPAP in children with craniofacial dysostoses.

We studied a group of children (aged 2.2-15 years) with craniofacial dysostosis and obstructive sleep apnoea to assess the use of nasal continuous positive airway pressure (n-CPAP) as a palliative form of treatment. A variable period of time was allowed for acclimatisation to n-CPAP (1 day to 2 months), depending on the patient. Patients were then admitted for their first CPAP trial. Baseline breathing difficulty and the effectiveness of n-CPAP were assessed by respiratory sleep studies. Successful results were obtained with n-CPAP in five of the eight patients, with marked clinical and polygraphic improvements of the respiratory pattern immediately after n-CPAP was established. Of the remaining three cases, one child needed a prolonged period of acclimatisation to the n-CPAP system, one was withdrawn from the study, and one failed to respond to n-CPAP and was found to have complete blockage of the upper airways as a result of enlarged adenoids. Our results confirm that n-CPAP can be tolerated even by young patients and can be effective, and that it may be a useful alternative palliative treatment for obstructive sleep apnoea in children with craniofacial syndromes.

Adolescent↗